904243 has 4 divisors (see below), whose sum is σ = 928720. Its totient is φ = 879768.

The previous prime is 904219. The next prime is 904261. The reversal of 904243 is 342409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342409 = 43 ⋅7963.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-904243 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (904283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12183 + ... + 12256.

It is an arithmetic number, because the mean of its divisors is an integer number (232180).

2⁹⁰⁴²⁴³ is an apocalyptic number.

904243 is a deficient number, since it is larger than the sum of its proper divisors (24477).

904243 is a wasteful number, since it uses less digits than its factorization.

904243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24476.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 904243 is about 950.9169259194. The cubic root of 904243 is about 96.7004255191.

The spelling of 904243 in words is "nine hundred four thousand, two hundred forty-three".