12616681 has 8 divisors (see below), whose sum is σ = 15729984. Its totient is φ = 9831120.

The previous prime is 12616649. The next prime is 12616687. The reversal of 12616681 is 18661621.

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 12616681 - 2⁵ = 12616649 is a prime.

It is a super-2 number, since 2×12616681² = 318361278911522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12616687) 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, 81850 + ... + 82003.

It is an arithmetic number, because the mean of its divisors is an integer number (1966248).

Almost surely, 2^12616681 is an apocalyptic number.

12616681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12616681 is a deficient number, since it is larger than the sum of its proper divisors (3113303).

12616681 is a wasteful number, since it uses less digits than its factorization.

12616681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163871.

The product of its digits is 3456, while the sum is 31.

The square root of 12616681 is about 3551.9967623859. The cubic root of 12616681 is about 232.7993200442.

It can be divided in two parts, 126 and 16681, that added together give a 5-th power (16807 = 7⁵).

The spelling of 12616681 in words is "twelve million, six hundred sixteen thousand, six hundred eighty-one".