57242745 has 48 divisors (see below), whose sum is σ = 118340352. Its totient is φ = 25027200.

The previous prime is 57242719. The next prime is 57242747. The reversal of 57242745 is 54724275.

It is a happy number.

57242745 is a `hidden beast` number, since 572 + 42 + 7 + 45 = 666.

It is not a de Polignac number, because 57242745 - 2⁶ = 57242681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57242747) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3295 + ... + 11195.

It is an arithmetic number, because the mean of its divisors is an integer number (2465424).

Almost surely, 2^57242745 is an apocalyptic number.

It is an amenable number.

57242745 is an abundant number, since it is smaller than the sum of its proper divisors (61097607).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57242745 is a wasteful number, since it uses less digits than its factorization.

57242745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7942 (or 7939 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 57242745 is about 7565.8935361265. The cubic root of 57242745 is about 385.3956577916.

The spelling of 57242745 in words is "fifty-seven million, two hundred forty-two thousand, seven hundred forty-five".