12312691 has 8 divisors (see below), whose sum is σ = 12575264. Its totient is φ = 12052800.

The previous prime is 12312689. The next prime is 12312701. The reversal of 12312691 is 19621321.

12312691 is nontrivially palindromic in base 15.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12312691 - 2¹ = 12312689 is a prime.

It is a super-2 number, since 2×12312691² = 303204719322962, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12312631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10465 + ... + 11581.

It is an arithmetic number, because the mean of its divisors is an integer number (1571908).

Almost surely, 2^12312691 is an apocalyptic number.

12312691 is a deficient number, since it is larger than the sum of its proper divisors (262573).

12312691 is a wasteful number, since it uses less digits than its factorization.

12312691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341.

The product of its digits is 648, while the sum is 25.

The square root of 12312691 is about 3508.9444281721. The cubic root of 12312691 is about 230.9143876695.

The spelling of 12312691 in words is "twelve million, three hundred twelve thousand, six hundred ninety-one".