57142687 has 4 divisors (see below), whose sum is σ = 65305936. Its totient is φ = 48979440.

The previous prime is 57142681. The next prime is 57142691. The reversal of 57142687 is 78624175.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57142687 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 (57142681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4081614 + ... + 4081627.

It is an arithmetic number, because the mean of its divisors is an integer number (16326484).

Almost surely, 2^57142687 is an apocalyptic number.

57142687 is a deficient number, since it is larger than the sum of its proper divisors (8163249).

57142687 is an equidigital number, since it uses as much as digits as its factorization.

57142687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8163248.

The product of its digits is 94080, while the sum is 40.

The square root of 57142687 is about 7559.2782062840. The cubic root of 57142687 is about 385.1709748279.

The spelling of 57142687 in words is "fifty-seven million, one hundred forty-two thousand, six hundred eighty-seven".