57242839 has 8 divisors (see below), whose sum is σ = 62334000. Its totient is φ = 52359552.

The previous prime is 57242821. The next prime is 57242849. The reversal of 57242839 is 93824275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57242839 - 2⁵ = 57242807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57242819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51394 + ... + 52495.

It is an arithmetic number, because the mean of its divisors is an integer number (7791750).

Almost surely, 2^57242839 is an apocalyptic number.

57242839 is a deficient number, since it is larger than the sum of its proper divisors (5091161).

57242839 is a wasteful number, since it uses less digits than its factorization.

57242839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103937.

The product of its digits is 120960, while the sum is 40.

The square root of 57242839 is about 7565.8997482124. The cubic root of 57242839 is about 385.3958687480.

It can be divided in two parts, 57242 and 839, that added together give a square (58081 = 241²).

The spelling of 57242839 in words is "fifty-seven million, two hundred forty-two thousand, eight hundred thirty-nine".