261076257 has 32 divisors (see below), whose sum is σ = 418172160. Its totient is φ = 160030080.

The previous prime is 261076253. The next prime is 261076261. The reversal of 261076257 is 752670162.

261076257 is a `hidden beast` number, since 26 + 1 + 0 + 7 + 625 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (261076253) and next prime (261076261).

It is not a de Polignac number, because 261076257 - 2² = 261076253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261076253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97308 + ... + 99954.

It is an arithmetic number, because the mean of its divisors is an integer number (13067880).

Almost surely, 2^261076257 is an apocalyptic number.

261076257 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

261076257 is a deficient number, since it is larger than the sum of its proper divisors (157095903).

261076257 is a wasteful number, since it uses less digits than its factorization.

261076257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950 (or 2944 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 261076257 is about 16157.8543439406. The cubic root of 261076257 is about 639.1298860923.

The spelling of 261076257 in words is "two hundred sixty-one million, seventy-six thousand, two hundred fifty-seven".