57420871 has 4 divisors (see below), whose sum is σ = 57437152. Its totient is φ = 57404592.

The previous prime is 57420859. The next prime is 57420893. The reversal of 57420871 is 17802475.

It is a happy number.

57420871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 57420871 - 2⁷ = 57420743 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 (57420821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390 + ... + 10723.

It is an arithmetic number, because the mean of its divisors is an integer number (14359288).

Almost surely, 2^57420871 is an apocalyptic number.

57420871 is a deficient number, since it is larger than the sum of its proper divisors (16281).

57420871 is a wasteful number, since it uses less digits than its factorization.

57420871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16280.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 57420871 is about 7577.6560360048. The cubic root of 57420871 is about 385.7949974999.

The spelling of 57420871 in words is "fifty-seven million, four hundred twenty thousand, eight hundred seventy-one".