402053921 has 8 divisors (see below), whose sum is σ = 405561984. Its totient is φ = 398558160.

The previous prime is 402053917. The next prime is 402053929. The reversal of 402053921 is 129350204.

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 402053921 - 2² = 402053917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402053929) 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, 69926 + ... + 75456.

It is an arithmetic number, because the mean of its divisors is an integer number (50695248).

Almost surely, 2^402053921 is an apocalyptic number.

It is an amenable number.

402053921 is a deficient number, since it is larger than the sum of its proper divisors (3508063).

402053921 is a wasteful number, since it uses less digits than its factorization.

402053921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6151.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 402053921 is about 20051.2822781986. The cubic root of 402053921 is about 738.0652656102.

The spelling of 402053921 in words is "four hundred two million, fifty-three thousand, nine hundred twenty-one".