57897261 has 10 divisors (see below), whose sum is σ = 86488622. Its totient is φ = 38598120.

The previous prime is 57897251. The next prime is 57897269. The reversal of 57897261 is 16279875.

57897261 is a `hidden beast` number, since 578 + 9 + 72 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40832100 + 17065161 = 6390^2 + 4131^2 .

It is not a de Polignac number, because 57897261 - 2¹⁵ = 57864493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57897269) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 357310 + ... + 357471.

Almost surely, 2^57897261 is an apocalyptic number.

It is an amenable number.

57897261 is a deficient number, since it is larger than the sum of its proper divisors (28591361).

57897261 is an equidigital number, since it uses as much as digits as its factorization.

57897261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714793 (or 714784 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 57897261 is about 7609.0249703888. The cubic root of 57897261 is about 386.8589715086.

The spelling of 57897261 in words is "fifty-seven million, eight hundred ninety-seven thousand, two hundred sixty-one".