400125404 has 24 divisors (see below), whose sum is σ = 809897088. Its totient is φ = 169415280.

The previous prime is 400125403. The next prime is 400125421. The reversal of 400125404 is 404521004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400125403) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 83762 + ... + 88409.

It is an arithmetic number, because the mean of its divisors is an integer number (33745712).

Almost surely, 2^400125404 is an apocalyptic number.

It is an amenable number.

400125404 is an abundant number, since it is smaller than the sum of its proper divisors (409771684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400125404 is a wasteful number, since it uses less digits than its factorization.

400125404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172265 (or 172263 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 400125404 is about 20003.1348543172. The cubic root of 400125404 is about 736.8832903972.

Adding to 400125404 its reverse (404521004), we get a palindrome (804646408).

The spelling of 400125404 in words is "four hundred million, one hundred twenty-five thousand, four hundred four".