400955 has 4 divisors (see below), whose sum is σ = 481152. Its totient is φ = 320760.

The previous prime is 400949. The next prime is 400963. The reversal of 400955 is 559004.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-400955 is a prime.

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 400955.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400955.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40091 + ... + 40100.

It is an arithmetic number, because the mean of its divisors is an integer number (120288).

2⁴⁰⁰⁹⁵⁵ is an apocalyptic number.

400955 is a deficient number, since it is larger than the sum of its proper divisors (80197).

400955 is an equidigital number, since it uses as much as digits as its factorization.

400955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80196.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 400955 is about 633.2100757253. The cubic root of 400955 is about 73.7392208703.

Adding to 400955 its reverse (559004), we get a palindrome (959959).

The spelling of 400955 in words is "four hundred thousand, nine hundred fifty-five".