| Base | Representation |
|---|---|
| bin | 10001010101011… |
| … | …11010100000000 |
| 3 | 101010122011220000 |
| 4 | 20222233110000 |
| 5 | 244211442233 |
| 6 | 22232520000 |
| 7 | 3414030405 |
| oct | 1052572400 |
| 9 | 333564800 |
| 10 | 145421568 |
| 11 | 750a5416 |
| 12 | 40850000 |
| 13 | 24187c86 |
| 14 | 154562ac |
| 15 | cb77d13 |
| hex | 8aaf500 |
145421568 has 90 divisors (see below), whose sum is σ = 433682634. Its totient is φ = 48466944.
The previous prime is 145421567. The next prime is 145421579. The reversal of 145421568 is 865124541.
It is a happy number.
It can be written as a sum of positive squares in only one way, i.e., 139428864 + 5992704 = 11808^2 + 2448^2 .
It is a super-2 number, since 2×1454215682 = 42294864879157248, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (145421567) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 17230 + ... + 24242.
Almost surely, 2145421568 is an apocalyptic number.
145421568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 145421568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216841317).
145421568 is an abundant number, since it is smaller than the sum of its proper divisors (288261066).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
145421568 is an frugal number, since it uses more digits than its factorization.
145421568 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7041 (or 7018 counting only the distinct ones).
The product of its digits is 38400, while the sum is 36.
The square root of 145421568 is about 12059.0865325695. The cubic root of 145421568 is about 525.8674313033.
It can be divided in two parts, 14542 and 1568, that added together give a triangular number (16110 = T179).
The spelling of 145421568 in words is "one hundred forty-five million, four hundred twenty-one thousand, five hundred sixty-eight".
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