400425249 has 16 divisors (see below), whose sum is σ = 611793920. Its totient is φ = 228206160.

The previous prime is 400425217. The next prime is 400425253. The reversal of 400425249 is 942524004.

It is not a de Polignac number, because 400425249 - 2⁵ = 400425217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400425269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17197 + ... + 33114.

It is an arithmetic number, because the mean of its divisors is an integer number (38237120).

Almost surely, 2^400425249 is an apocalyptic number.

It is an amenable number.

400425249 is a deficient number, since it is larger than the sum of its proper divisors (211368671).

400425249 is a wasteful number, since it uses less digits than its factorization.

400425249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50700.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 400425249 is about 20010.6284009273. The cubic root of 400425249 is about 737.0673123722.

The spelling of 400425249 in words is "four hundred million, four hundred twenty-five thousand, two hundred forty-nine".