396531 has 6 divisors (see below), whose sum is σ = 572780. Its totient is φ = 264348.

The previous prime is 396527. The next prime is 396533. The reversal of 396531 is 135693.

396531 is a `hidden beast` number, since 3 + 9 + 653 + 1 = 666.

It is not a de Polignac number, because 396531 - 2² = 396527 is a prime.

It is a super-2 number, since 2×396531² = 314473667922, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 396495 and 396504.

It is not an unprimeable number, because it can be changed into a prime (396533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22021 + ... + 22038.

2³⁹⁶⁵³¹ is an apocalyptic number.

396531 is a deficient number, since it is larger than the sum of its proper divisors (176249).

396531 is a wasteful number, since it uses less digits than its factorization.

396531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44065 (or 44062 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 396531 is about 629.7070747578. The cubic root of 396531 is about 73.4670128248.

It can be divided in two parts, 396 and 531, that multiplied together give a triangular number (210276 = T₆₄₈).

The spelling of 396531 in words is "three hundred ninety-six thousand, five hundred thirty-one".