400994125 has 32 divisors (see below), whose sum is σ = 579271680. Its totient is φ = 271440000.

The previous prime is 400994119. The next prime is 400994137. The reversal of 400994125 is 521499004.

It is not a de Polignac number, because 400994125 - 2⁷ = 400993997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66225 + ... + 72025.

It is an arithmetic number, because the mean of its divisors is an integer number (18102240).

Almost surely, 2^400994125 is an apocalyptic number.

It is an amenable number.

400994125 is a deficient number, since it is larger than the sum of its proper divisors (178277555).

400994125 is an equidigital number, since it uses as much as digits as its factorization.

400994125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902 (or 5892 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 400994125 is about 20024.8377022137. The cubic root of 400994125 is about 737.4161927175.

The spelling of 400994125 in words is "four hundred million, nine hundred ninety-four thousand, one hundred twenty-five".