57245242 has 4 divisors (see below), whose sum is σ = 85867866. Its totient is φ = 28622620.

The previous prime is 57245231. The next prime is 57245249. The reversal of 57245242 is 24254275.

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., 28740321 + 28504921 = 5361^2 + 5339^2 .

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 not an unprimeable number, because it can be changed into a prime (57245249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14311309 + ... + 14311312.

Almost surely, 2^57245242 is an apocalyptic number.

57245242 is a deficient number, since it is larger than the sum of its proper divisors (28622624).

57245242 is a wasteful number, since it uses less digits than its factorization.

57245242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28622623.

The product of its digits is 22400, while the sum is 31.

The square root of 57245242 is about 7566.0585511877. The cubic root of 57245242 is about 385.4012615234.

The spelling of 57245242 in words is "fifty-seven million, two hundred forty-five thousand, two hundred forty-two".