405853 has 8 divisors (see below), whose sum is σ = 476672. Its totient is φ = 338256.

The previous prime is 405829. The next prime is 405857. The reversal of 405853 is 358504.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405853 - 2⁹ = 405341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405857) 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, 525 + ... + 1042.

It is an arithmetic number, because the mean of its divisors is an integer number (59584).

2⁴⁰⁵⁸⁵³ is an apocalyptic number.

It is an amenable number.

405853 is a deficient number, since it is larger than the sum of its proper divisors (70819).

405853 is a wasteful number, since it uses less digits than its factorization.

405853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 405853 is about 637.0659306540. The cubic root of 405853 is about 74.0382684946.

The spelling of 405853 in words is "four hundred five thousand, eight hundred fifty-three".