57072461 has 2 divisors, whose sum is σ = 57072462. Its totient is φ = 57072460.

The previous prime is 57072439. The next prime is 57072469. The reversal of 57072461 is 16427075.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55875625 + 1196836 = 7475^2 + 1094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57072461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57072469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28536230 + 28536231.

It is an arithmetic number, because the mean of its divisors is an integer number (28536231).

Almost surely, 2^57072461 is an apocalyptic number.

It is an amenable number.

57072461 is a deficient number, since it is larger than the sum of its proper divisors (1).

57072461 is an equidigital number, since it uses as much as digits as its factorization.

57072461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 57072461 is about 7554.6317580674. The cubic root of 57072461 is about 385.0131237445.

The spelling of 57072461 in words is "fifty-seven million, seventy-two thousand, four hundred sixty-one".