57420643 has 4 divisors (see below), whose sum is σ = 65623600. Its totient is φ = 49217688.

The previous prime is 57420631. The next prime is 57420653. The reversal of 57420643 is 34602475.

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 57420643 - 2¹⁷ = 57289571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57420613) 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, 4101468 + ... + 4101481.

It is an arithmetic number, because the mean of its divisors is an integer number (16405900).

Almost surely, 2^57420643 is an apocalyptic number.

57420643 is a deficient number, since it is larger than the sum of its proper divisors (8202957).

57420643 is an equidigital number, since it uses as much as digits as its factorization.

57420643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8202956.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 57420643 is about 7577.6409917599. The cubic root of 57420643 is about 385.7944868762.

The spelling of 57420643 in words is "fifty-seven million, four hundred twenty thousand, six hundred forty-three".