57565121 has 2 divisors, whose sum is σ = 57565122. Its totient is φ = 57565120.

The previous prime is 57565103. The next prime is 57565133. The reversal of 57565121 is 12156575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32364721 + 25200400 = 5689^2 + 5020^2 .

It is a cyclic number.

It is not a de Polignac number, because 57565121 - 2¹⁰ = 57564097 is a prime.

It is not a weakly prime, because it can be changed into another prime (57565141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28782560 + 28782561.

It is an arithmetic number, because the mean of its divisors is an integer number (28782561).

Almost surely, 2^57565121 is an apocalyptic number.

It is an amenable number.

57565121 is a deficient number, since it is larger than the sum of its proper divisors (1).

57565121 is an equidigital number, since it uses as much as digits as its factorization.

57565121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 32.

The square root of 57565121 is about 7587.1681805533. The cubic root of 57565121 is about 386.1177860095.

The spelling of 57565121 in words is "fifty-seven million, five hundred sixty-five thousand, one hundred twenty-one".