404825 has 6 divisors (see below), whose sum is σ = 502014. Its totient is φ = 323840.

The previous prime is 404819. The next prime is 404827. The reversal of 404825 is 528404.

It can be written as a sum of positive squares in 3 ways, for example, as 121801 + 283024 = 349^2 + 532^2 .

It is not a de Polignac number, because 404825 - 2¹⁶ = 339289 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 404825.

It is not an unprimeable number, because it can be changed into a prime (404827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8072 + ... + 8121.

It is an arithmetic number, because the mean of its divisors is an integer number (83669).

2⁴⁰⁴⁸²⁵ is an apocalyptic number.

It is an amenable number.

404825 is a deficient number, since it is larger than the sum of its proper divisors (97189).

404825 is a wasteful number, since it uses less digits than its factorization.

404825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16203 (or 16198 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 404825 is about 636.2585952268. The cubic root of 404825 is about 73.9757042227.

The spelling of 404825 in words is "four hundred four thousand, eight hundred twenty-five".