400125 has 32 divisors (see below), whose sum is σ = 733824. Its totient is φ = 192000.

The previous prime is 400123. The next prime is 400151. The reversal of 400125 is 521004.

It is not a de Polignac number, because 400125 - 2¹ = 400123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4077 + ... + 4173.

It is an arithmetic number, because the mean of its divisors is an integer number (22932).

2⁴⁰⁰¹²⁵ is an apocalyptic number.

It is an amenable number.

400125 is a deficient number, since it is larger than the sum of its proper divisors (333699).

400125 is a wasteful number, since it uses less digits than its factorization.

400125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 400125 is about 632.5543454914. The cubic root of 400125 is about 73.6883042391.

Adding to 400125 its reverse (521004), we get a palindrome (921129).

It can be divided in two parts, 400 and 125, that added together give a palindrome (525).

The spelling of 400125 in words is "four hundred thousand, one hundred twenty-five".