400259 has 4 divisors (see below), whose sum is σ = 405816. Its totient is φ = 394704.

The previous prime is 400249. The next prime is 400261. The reversal of 400259 is 952004.

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

It is a cyclic number.

It is not a de Polignac number, because 400259 - 2⁴ = 400243 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 400259.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400259.

It is not an unprimeable number, because it can be changed into a prime (400249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2669 + ... + 2814.

It is an arithmetic number, because the mean of its divisors is an integer number (101454).

2⁴⁰⁰²⁵⁹ is an apocalyptic number.

400259 is a deficient number, since it is larger than the sum of its proper divisors (5557).

400259 is an equidigital number, since it uses as much as digits as its factorization.

400259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 400259 is about 632.6602563778. The cubic root of 400259 is about 73.6965292777.

The spelling of 400259 in words is "four hundred thousand, two hundred fifty-nine".