57261437 has 2 divisors, whose sum is σ = 57261438. Its totient is φ = 57261436.

The previous prime is 57261427. The next prime is 57261469. The reversal of 57261437 is 73416275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41847961 + 15413476 = 6469^2 + 3926^2 .

It is a cyclic number.

It is not a de Polignac number, because 57261437 - 2²⁴ = 40484221 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 57261397 and 57261406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57261427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28630718 + 28630719.

It is an arithmetic number, because the mean of its divisors is an integer number (28630719).

Almost surely, 2^57261437 is an apocalyptic number.

It is an amenable number.

57261437 is a deficient number, since it is larger than the sum of its proper divisors (1).

57261437 is an equidigital number, since it uses as much as digits as its factorization.

57261437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 35.

The square root of 57261437 is about 7567.1287157019. The cubic root of 57261437 is about 385.4376021560.

The spelling of 57261437 in words is "fifty-seven million, two hundred sixty-one thousand, four hundred thirty-seven".