806531 has 16 divisors (see below), whose sum is σ = 984960. Its totient is φ = 650880.

The previous prime is 806521. The next prime is 806543. The reversal of 806531 is 135608.

It is a cyclic number.

It is not a de Polignac number, because 806531 - 2⁶ = 806467 is a prime.

It is a super-2 number, since 2×806531² = 1300984507922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 806497 and 806506.

It is not an unprimeable number, because it can be changed into a prime (806521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3440 + ... + 3666.

It is an arithmetic number, because the mean of its divisors is an integer number (61560).

2⁸⁰⁶⁵³¹ is an apocalyptic number.

806531 is a deficient number, since it is larger than the sum of its proper divisors (178429).

806531 is a wasteful number, since it uses less digits than its factorization.

806531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 806531 is about 898.0707099110. The cubic root of 806531 is about 93.0837108075.

The spelling of 806531 in words is "eight hundred six thousand, five hundred thirty-one".