405975 has 12 divisors (see below), whose sum is σ = 671336. Its totient is φ = 216480.

The previous prime is 405967. The next prime is 405989. The reversal of 405975 is 579504.

It is not a de Polignac number, because 405975 - 2³ = 405967 is a prime.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 2632 + ... + 2781.

2⁴⁰⁵⁹⁷⁵ is an apocalyptic number.

405975 is a deficient number, since it is larger than the sum of its proper divisors (265361).

405975 is a wasteful number, since it uses less digits than its factorization.

405975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5426 (or 5421 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 405975 is about 637.1616749303. The cubic root of 405975 is about 74.0456864217.

The spelling of 405975 in words is "four hundred five thousand, nine hundred seventy-five".