57291 has 12 divisors (see below), whose sum is σ = 83448. Its totient is φ = 34944.

The previous prime is 57287. The next prime is 57301. The reversal of 57291 is 19275.

57291 is a nontrivial binomial coefficient, being equal to C(339, 2).

It is not a de Polignac number, because 57291 - 2² = 57287 is a prime.

57291 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (57221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 451 + ... + 563.

It is an arithmetic number, because the mean of its divisors is an integer number (6954).

2⁵⁷²⁹¹ is an apocalyptic number.

57291 is the 338-th triangular number.

57291 is a deficient number, since it is larger than the sum of its proper divisors (26157).

57291 is a wasteful number, since it uses less digits than its factorization.

57291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 129 counting only the distinct ones).

The product of its digits is 630, while the sum is 24.

The square root of 57291 is about 239.3553843138. The cubic root of 57291 is about 38.5503922132.

The spelling of 57291 in words is "fifty-seven thousand, two hundred ninety-one".