57120521 has 8 divisors (see below), whose sum is σ = 57711360. Its totient is φ = 56532528.

The previous prime is 57120509. The next prime is 57120533. The reversal of 57120521 is 12502175.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (57120509) and next prime (57120533).

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 57120521 - 2¹⁸ = 56858377 is a prime.

It is a super-2 number, since 2×57120521² = 6525507838622882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57120571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84035 + ... + 84711.

It is an arithmetic number, because the mean of its divisors is an integer number (7213920).

Almost surely, 2^57120521 is an apocalyptic number.

It is an amenable number.

57120521 is a deficient number, since it is larger than the sum of its proper divisors (590839).

57120521 is a wasteful number, since it uses less digits than its factorization.

57120521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 57120521 is about 7557.8119188030. The cubic root of 57120521 is about 385.1211649895.

Adding to 57120521 its reverse (12502175), we get a palindrome (69622696).

The spelling of 57120521 in words is "fifty-seven million, one hundred twenty thousand, five hundred twenty-one".