404615 has 4 divisors (see below), whose sum is σ = 485544. Its totient is φ = 323688.

The previous prime is 404597. The next prime is 404671. The reversal of 404615 is 516404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 404615 - 2¹⁰ = 403591 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40457 + ... + 40466.

It is an arithmetic number, because the mean of its divisors is an integer number (121386).

2⁴⁰⁴⁶¹⁵ is an apocalyptic number.

404615 is a deficient number, since it is larger than the sum of its proper divisors (80929).

404615 is an equidigital number, since it uses as much as digits as its factorization.

404615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80928.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 404615 is about 636.0935465794. The cubic root of 404615 is about 73.9629105589.

The spelling of 404615 in words is "four hundred four thousand, six hundred fifteen".