57506 has 4 divisors (see below), whose sum is σ = 86262. Its totient is φ = 28752.

The previous prime is 57503. The next prime is 57527. The reversal of 57506 is 60575.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 36481 + 21025 = 191^2 + 145^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14375 + ... + 14378.

2⁵⁷⁵⁰⁶ is an apocalyptic number.

57506 is a deficient number, since it is larger than the sum of its proper divisors (28756).

57506 is a wasteful number, since it uses less digits than its factorization.

57506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28755.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 57506 is about 239.8040867041. The cubic root of 57506 is about 38.5985556119.

The spelling of 57506 in words is "fifty-seven thousand, five hundred six".