400425225 has 24 divisors (see below), whose sum is σ = 700981920. Its totient is φ = 200997120.

The previous prime is 400425217. The next prime is 400425253. The reversal of 400425225 is 522524004.

It is a happy number.

It is not a de Polignac number, because 400425225 - 2³ = 400425217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400425195 and 400425204.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 155755 + ... + 158304.

It is an arithmetic number, because the mean of its divisors is an integer number (29207580).

Almost surely, 2^400425225 is an apocalyptic number.

It is an amenable number.

400425225 is a deficient number, since it is larger than the sum of its proper divisors (300556695).

400425225 is a wasteful number, since it uses less digits than its factorization.

400425225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314089 (or 314084 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 400425225 is about 20010.6278012460. The cubic root of 400425225 is about 737.0672976465.

Adding to 400425225 its reverse (522524004), we get a palindrome (922949229).

The spelling of 400425225 in words is "four hundred million, four hundred twenty-five thousand, two hundred twenty-five".