405902 has 16 divisors (see below), whose sum is σ = 706560. Its totient is φ = 171288.

The previous prime is 405901. The next prime is 405917. The reversal of 405902 is 209504.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 405902.

It is not an unprimeable number, because it can be changed into a prime (405901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923 + ... + 1289.

It is an arithmetic number, because the mean of its divisors is an integer number (44160).

2⁴⁰⁵⁹⁰² is an apocalyptic number.

405902 is a deficient number, since it is larger than the sum of its proper divisors (300658).

405902 is a wasteful number, since it uses less digits than its factorization.

405902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

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

The square root of 405902 is about 637.1043870513. The cubic root of 405902 is about 74.0412480046.

The spelling of 405902 in words is "four hundred five thousand, nine hundred two".