405256 has 16 divisors (see below), whose sum is σ = 766800. Its totient is φ = 200784.

The previous prime is 405253. The next prime is 405269. The reversal of 405256 is 652504.

It is not an unprimeable number, because it can be changed into a prime (405253) 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, 1291 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (47925).

2⁴⁰⁵²⁵⁶ is an apocalyptic number.

It is an amenable number.

405256 is a deficient number, since it is larger than the sum of its proper divisors (361544).

405256 is a wasteful number, since it uses less digits than its factorization.

405256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 405256 is about 636.5972038896. The cubic root of 405256 is about 74.0019478426.

The spelling of 405256 in words is "four hundred five thousand, two hundred fifty-six".