57420281 has 4 divisors (see below), whose sum is σ = 58147200. Its totient is φ = 56693364.

The previous prime is 57420269. The next prime is 57420289. The reversal of 57420281 is 18202475.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57420281 is a prime.

It is a super-2 number, since 2×57420281² = 6594177340237922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57420289) 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, 363341 + ... + 363498.

It is an arithmetic number, because the mean of its divisors is an integer number (14536800).

Almost surely, 2^57420281 is an apocalyptic number.

It is an amenable number.

57420281 is a deficient number, since it is larger than the sum of its proper divisors (726919).

57420281 is an equidigital number, since it uses as much as digits as its factorization.

57420281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726918.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 57420281 is about 7577.6171056606. The cubic root of 57420281 is about 385.7936761463.

The spelling of 57420281 in words is "fifty-seven million, four hundred twenty thousand, two hundred eighty-one".