57145761 has 6 divisors (see below), whose sum is σ = 82543890. Its totient is φ = 38097168.

The previous prime is 57145733. The next prime is 57145771. The reversal of 57145761 is 16754175.

It can be written as a sum of positive squares in only one way, i.e., 52056225 + 5089536 = 7215^2 + 2256^2 .

It is not a de Polignac number, because 57145761 - 2⁵ = 57145729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57145771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3174756 + ... + 3174773.

It is an arithmetic number, because the mean of its divisors is an integer number (13757315).

Almost surely, 2^57145761 is an apocalyptic number.

It is an amenable number.

57145761 is a deficient number, since it is larger than the sum of its proper divisors (25398129).

57145761 is a wasteful number, since it uses less digits than its factorization.

57145761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6349535 (or 6349532 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 57145761 is about 7559.4815298405. The cubic root of 57145761 is about 385.1778814821.

The spelling of 57145761 in words is "fifty-seven million, one hundred forty-five thousand, seven hundred sixty-one".