400075 has 12 divisors (see below), whose sum is σ = 534688. Its totient is φ = 295200.

The previous prime is 400069. The next prime is 400087. The reversal of 400075 is 570004.

It is not a de Polignac number, because 400075 - 2³ = 400067 is a prime.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291 + ... + 940.

2⁴⁰⁰⁰⁷⁵ is an apocalyptic number.

400075 is a deficient number, since it is larger than the sum of its proper divisors (134613).

400075 is a wasteful number, since it uses less digits than its factorization.

400075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254 (or 1249 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 400075 is about 632.5148219607. The cubic root of 400075 is about 73.6852347244.

Adding to 400075 its reverse (570004), we get a palindrome (970079).

The spelling of 400075 in words is "four hundred thousand, seventy-five".