| Base | Representation |
|---|---|
| bin | 11111001000010… |
| … | …11101110000000 |
| 3 | 200012101110102200 |
| 4 | 33210023232000 |
| 5 | 1013323042144 |
| 6 | 41525113200 |
| 7 | 6320453043 |
| oct | 1744135600 |
| 9 | 605343380 |
| 10 | 261143424 |
| 11 | 124454a13 |
| 12 | 73558800 |
| 13 | 42144849 |
| 14 | 2697ac5a |
| 15 | 17dd5c69 |
| hex | f90bb80 |
261143424 has 96 divisors (see below), whose sum is σ = 754679640. Its totient is φ = 86676480.
The previous prime is 261143417. The next prime is 261143431. The reversal of 261143424 is 424341162.
It is a happy number.
261143424 is a `hidden beast` number, since 2 + 611 + 4 + 3 + 42 + 4 = 666.
It is an interprime number because it is at equal distance from previous prime (261143417) and next prime (261143431).
It is a tau number, because it is divible by the number of its divisors (96).
It is a nude number because it is divisible by every one of its digits.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 457059 + ... + 457629.
Almost surely, 2261143424 is an apocalyptic number.
261143424 is a gapful number since it is divisible by the number (24) 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 261143424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377339820).
261143424 is an abundant number, since it is smaller than the sum of its proper divisors (493536216).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
261143424 is a wasteful number, since it uses less digits than its factorization.
261143424 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 988 (or 973 counting only the distinct ones).
The product of its digits is 4608, while the sum is 27.
The square root of 261143424 is about 16159.9326731271. The cubic root of 261143424 is about 639.1846909689.
Adding to 261143424 its reverse (424341162), we get a palindrome (685484586).
The spelling of 261143424 in words is "two hundred sixty-one million, one hundred forty-three thousand, four hundred twenty-four".
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