400355125 has 8 divisors (see below), whose sum is σ = 499643352. Its totient is φ = 320284000.

The previous prime is 400355113. The next prime is 400355149. The reversal of 400355125 is 521553004.

It can be written as a sum of positive squares in 4 ways, for example, as 75076 + 400280049 = 274^2 + 20007^2 .

It is not a de Polignac number, because 400355125 - 2⁵ = 400355093 is a prime.

It is a super-2 number, since 2×400355125² = 320568452227531250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400355125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1601296 + ... + 1601545.

It is an arithmetic number, because the mean of its divisors is an integer number (62455419).

Almost surely, 2^400355125 is an apocalyptic number.

It is an amenable number.

400355125 is a deficient number, since it is larger than the sum of its proper divisors (99288227).

400355125 is an equidigital number, since it uses as much as digits as its factorization.

400355125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202856 (or 3202846 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 400355125 is about 20008.8761553467. The cubic root of 400355125 is about 737.0242838454.

The spelling of 400355125 in words is "four hundred million, three hundred fifty-five thousand, one hundred twenty-five".