57561142 has 4 divisors (see below), whose sum is σ = 86341716. Its totient is φ = 28780570.

The previous prime is 57561139. The next prime is 57561149. The reversal of 57561142 is 24116575.

57561142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57561149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14390284 + ... + 14390287.

It is an arithmetic number, because the mean of its divisors is an integer number (21585429).

Almost surely, 2^57561142 is an apocalyptic number.

57561142 is a deficient number, since it is larger than the sum of its proper divisors (28780574).

57561142 is a wasteful number, since it uses less digits than its factorization.

57561142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28780573.

The product of its digits is 8400, while the sum is 31.

The square root of 57561142 is about 7586.9059569761. The cubic root of 57561142 is about 386.1088894297.

The spelling of 57561142 in words is "fifty-seven million, five hundred sixty-one thousand, one hundred forty-two".