400875 has 16 divisors (see below), whose sum is σ = 667680. Its totient is φ = 213600.

The previous prime is 400871. The next prime is 400903. The reversal of 400875 is 578004.

400875 = T₉ + T₁₀ + ... + T₁₃₃.

It is not a de Polignac number, because 400875 - 2² = 400871 is a prime.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (400871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160 + ... + 909.

It is an arithmetic number, because the mean of its divisors is an integer number (41730).

2⁴⁰⁰⁸⁷⁵ is an apocalyptic number.

400875 is a deficient number, since it is larger than the sum of its proper divisors (266805).

400875 is a wasteful number, since it uses less digits than its factorization.

400875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 400875 is about 633.1469023852. The cubic root of 400875 is about 73.7343163049.

Adding to 400875 its reverse (578004), we get a palindrome (978879).

It can be divided in two parts, 400 and 875, that added together give a triangular number (1275 = T₅₀).

The spelling of 400875 in words is "four hundred thousand, eight hundred seventy-five".