804531 has 24 divisors (see below), whose sum is σ = 1347024. Its totient is φ = 423360.

The previous prime is 804523. The next prime is 804541. The reversal of 804531 is 135408.

804531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 804531 - 2³ = 804523 is a prime.

It is a super-2 number, since 2×804531² = 1294540259922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 804498 and 804507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1701 + ... + 2121.

It is an arithmetic number, because the mean of its divisors is an integer number (56126).

2⁸⁰⁴⁵³¹ is an apocalyptic number.

804531 is a deficient number, since it is larger than the sum of its proper divisors (542493).

804531 is a wasteful number, since it uses less digits than its factorization.

804531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 804531 is about 896.9565206854. The cubic root of 804531 is about 93.0067054941.

Adding to 804531 its reverse (135408), we get a palindrome (939939).

The spelling of 804531 in words is "eight hundred four thousand, five hundred thirty-one".