401605057 has 4 divisors (see below), whose sum is σ = 458977216. Its totient is φ = 344232900.

The previous prime is 401605049. The next prime is 401605069. The reversal of 401605057 is 750506104.

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 not a de Polignac number, because 401605057 - 2³ = 401605049 is a prime.

It is a super-2 number, since 2×401605057² = 322573243615946498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401605027) 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, 28686069 + ... + 28686082.

It is an arithmetic number, because the mean of its divisors is an integer number (114744304).

Almost surely, 2^401605057 is an apocalyptic number.

It is an amenable number.

401605057 is a deficient number, since it is larger than the sum of its proper divisors (57372159).

401605057 is an equidigital number, since it uses as much as digits as its factorization.

401605057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57372158.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 401605057 is about 20040.0862523094. The cubic root of 401605057 is about 737.7904979119.

The spelling of 401605057 in words is "four hundred one million, six hundred five thousand, fifty-seven".