76421057 has 8 divisors (see below), whose sum is σ = 77155200. Its totient is φ = 75690160.

The previous prime is 76421053. The next prime is 76421087. The reversal of 76421057 is 75012467.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76421057 - 2² = 76421053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76421053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83432 + ... + 84342.

It is an arithmetic number, because the mean of its divisors is an integer number (9644400).

Almost surely, 2^76421057 is an apocalyptic number.

It is an amenable number.

76421057 is a deficient number, since it is larger than the sum of its proper divisors (734143).

76421057 is a wasteful number, since it uses less digits than its factorization.

76421057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 76421057 is about 8741.9138064843. The cubic root of 76421057 is about 424.3631652525.

The spelling of 76421057 in words is "seventy-six million, four hundred twenty-one thousand, fifty-seven".