400123225 has 6 divisors (see below), whose sum is σ = 496152830. Its totient is φ = 320098560.

The previous prime is 400123219. The next prime is 400123277. The reversal of 400123225 is 522321004.

It can be written as a sum of positive squares in 3 ways, for example, as 102353689 + 297769536 = 10117^2 + 17256^2 .

It is not a de Polignac number, because 400123225 - 2⁵ = 400123193 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8002440 + ... + 8002489.

Almost surely, 2^400123225 is an apocalyptic number.

It is an amenable number.

400123225 is a deficient number, since it is larger than the sum of its proper divisors (96029605).

400123225 is a wasteful number, since it uses less digits than its factorization.

400123225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16004939 (or 16004934 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 400123225 is about 20003.0803877803. The cubic root of 400123225 is about 736.8819527569.

Adding to 400123225 its reverse (522321004), we get a palindrome (922444229).

The spelling of 400123225 in words is "four hundred million, one hundred twenty-three thousand, two hundred twenty-five".