404539 has 2 divisors, whose sum is σ = 404540. Its totient is φ = 404538.

The previous prime is 404533. The next prime is 404557. The reversal of 404539 is 935404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404539 - 2³ = 404531 is a prime.

It is not a weakly prime, because it can be changed into another prime (404531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202269 + 202270.

It is an arithmetic number, because the mean of its divisors is an integer number (202270).

2⁴⁰⁴⁵³⁹ is an apocalyptic number.

404539 is a deficient number, since it is larger than the sum of its proper divisors (1).

404539 is an equidigital number, since it uses as much as digits as its factorization.

404539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 404539 is about 636.0338041331. The cubic root of 404539 is about 73.9582793802.

The spelling of 404539 in words is "four hundred four thousand, five hundred thirty-nine".