57212842 has 4 divisors (see below), whose sum is σ = 85819266. Its totient is φ = 28606420.

The previous prime is 57212839. The next prime is 57212851. The reversal of 57212842 is 24821275.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 45441081 + 11771761 = 6741^2 + 3431^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14303209 + ... + 14303212.

Almost surely, 2^57212842 is an apocalyptic number.

57212842 is a deficient number, since it is larger than the sum of its proper divisors (28606424).

57212842 is a wasteful number, since it uses less digits than its factorization.

57212842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28606423.

The product of its digits is 8960, while the sum is 31.

The square root of 57212842 is about 7563.9171068964. The cubic root of 57212842 is about 385.3285372410.

The spelling of 57212842 in words is "fifty-seven million, two hundred twelve thousand, eight hundred forty-two".