904531 has 2 divisors, whose sum is σ = 904532. Its totient is φ = 904530.

The previous prime is 904523. The next prime is 904559. The reversal of 904531 is 135409.

It is a weak prime.

It is an emirp because it is prime and its reverse (135409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 904531 - 2³ = 904523 is a prime.

It is a super-2 number, since 2×904531² = 1636352659922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (904511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452265 + 452266.

It is an arithmetic number, because the mean of its divisors is an integer number (452266).

2⁹⁰⁴⁵³¹ is an apocalyptic number.

904531 is a deficient number, since it is larger than the sum of its proper divisors (1).

904531 is an equidigital number, since it uses as much as digits as its factorization.

904531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 904531 is about 951.0683466502. The cubic root of 904531 is about 96.7106907415.

The spelling of 904531 in words is "nine hundred four thousand, five hundred thirty-one".