57247 has 8 divisors (see below), whose sum is σ = 63360. Its totient is φ = 51480.

The previous prime is 57241. The next prime is 57251. The reversal of 57247 is 74275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57247 - 2⁷ = 57119 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 (57241) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 372 + ... + 502.

It is an arithmetic number, because the mean of its divisors is an integer number (7920).

2⁵⁷²⁴⁷ is an apocalyptic number.

57247 is a deficient number, since it is larger than the sum of its proper divisors (6113).

57247 is a wasteful number, since it uses less digits than its factorization.

57247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173.

The product of its digits is 1960, while the sum is 25.

The square root of 57247 is about 239.2634531223. The cubic root of 57247 is about 38.5405206704.

The spelling of 57247 in words is "fifty-seven thousand, two hundred forty-seven".