57142307 has 4 divisors (see below), whose sum is σ = 57199296. Its totient is φ = 57085320.

The previous prime is 57142303. The next prime is 57142339. The reversal of 57142307 is 70324175.

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

It is a cyclic number.

It is not a de Polignac number, because 57142307 - 2² = 57142303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57142307.

It is not an unprimeable number, because it can be changed into a prime (57142301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26963 + ... + 29004.

It is an arithmetic number, because the mean of its divisors is an integer number (14299824).

Almost surely, 2^57142307 is an apocalyptic number.

57142307 is a deficient number, since it is larger than the sum of its proper divisors (56989).

57142307 is a wasteful number, since it uses less digits than its factorization.

57142307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56988.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 57142307 is about 7559.2530715673. The cubic root of 57142307 is about 385.1701210278.

The spelling of 57142307 in words is "fifty-seven million, one hundred forty-two thousand, three hundred seven".