12311685 has 24 divisors (see below), whose sum is σ = 21864024. Its totient is φ = 6405120.

The previous prime is 12311683. The next prime is 12311699. The reversal of 12311685 is 58611321.

It can be written as a sum of positive squares in 4 ways, for example, as 799236 + 11512449 = 894^2 + 3393^2 .

It is not a de Polignac number, because 12311685 - 2¹ = 12311683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311683) 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, 1492 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (911001).

Almost surely, 2^12311685 is an apocalyptic number.

12311685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12311685 is a deficient number, since it is larger than the sum of its proper divisors (9552339).

12311685 is a wasteful number, since it uses less digits than its factorization.

12311685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6725 (or 6722 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 12311685 is about 3508.8010772912. The cubic root of 12311685 is about 230.9080985975.

It can be divided in two parts, 123116 and 85, that added together give a square (123201 = 351²).

The spelling of 12311685 in words is "twelve million, three hundred eleven thousand, six hundred eighty-five".