| Base | Representation |
|---|---|
| bin | 1110101001001… |
| … | …1010111110000 |
| 3 | 11021120111211100 |
| 4 | 3222103113300 |
| 5 | 111210433130 |
| 6 | 10032244400 |
| 7 | 1344033042 |
| oct | 352232760 |
| 9 | 137514740 |
| 10 | 61421040 |
| 11 | 3174159a |
| 12 | 186a0700 |
| 13 | c956a15 |
| 14 | 822ba92 |
| 15 | 55d3c60 |
| hex | 3a935f0 |
61421040 has 120 divisors (see below), whose sum is σ = 215298720. Its totient is φ = 15662592.
The previous prime is 61421033. The next prime is 61421047. The reversal of 61421040 is 4012416.
61421040 is a `hidden beast` number, since 614 + 2 + 10 + 40 = 666.
It is an interprime number because it is at equal distance from previous prime (61421033) and next prime (61421047).
It is a tau number, because it is divible by the number of its divisors (120).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (61421047) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14706 + ... + 18414.
It is an arithmetic number, because the mean of its divisors is an integer number (1794156).
Almost surely, 261421040 is an apocalyptic number.
61421040 is a gapful number since it is divisible by the number (60) 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 61421040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107649360).
61421040 is an abundant number, since it is smaller than the sum of its proper divisors (153877680).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
61421040 is a wasteful number, since it uses less digits than its factorization.
61421040 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3751 (or 3742 counting only the distinct ones).
The product of its (nonzero) digits is 192, while the sum is 18.
The square root of 61421040 is about 7837.1576480252. The cubic root of 61421040 is about 394.5533379765.
Adding to 61421040 its reverse (4012416), we get a palindrome (65433456).
The spelling of 61421040 in words is "sixty-one million, four hundred twenty-one thousand, forty".
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