8685531 has 6 divisors (see below), whose sum is σ = 12545780. Its totient is φ = 5790348.

The previous prime is 8685517. The next prime is 8685539. The reversal of 8685531 is 1355868.

8685531 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8685531 - 2¹¹ = 8683483 is a prime.

It is a super-2 number, since 2×8685531² = 150876897503922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8685539) 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, 482521 + ... + 482538.

Almost surely, 2^8685531 is an apocalyptic number.

8685531 is a deficient number, since it is larger than the sum of its proper divisors (3860249).

8685531 is a wasteful number, since it uses less digits than its factorization.

8685531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965065 (or 965062 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 8685531 is about 2947.1224949092. The cubic root of 8685531 is about 205.5569309650.

It can be divided in two parts, 8685 and 531, that added together give a square (9216 = 96²).

The spelling of 8685531 in words is "eight million, six hundred eighty-five thousand, five hundred thirty-one".