904161 has 12 divisors (see below), whose sum is σ = 1241808. Its totient is φ = 585144.

The previous prime is 904157. The next prime is 904181. The reversal of 904161 is 161409.

It is not a de Polignac number, because 904161 - 2² = 904157 is a prime.

It is a super-2 number, since 2×904161² = 1635014227842, which contains 22 as substring.

It is an Ulam number.

904161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (904121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5466 + ... + 5628.

It is an arithmetic number, because the mean of its divisors is an integer number (103484).

2⁹⁰⁴¹⁶¹ is an apocalyptic number.

It is an amenable number.

904161 is a deficient number, since it is larger than the sum of its proper divisors (337647).

904161 is a wasteful number, since it uses less digits than its factorization.

904161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 904161 is about 950.8738086623. The cubic root of 904161 is about 96.6975023836.

The spelling of 904161 in words is "nine hundred four thousand, one hundred sixty-one".