12608981 has 8 divisors (see below), whose sum is σ = 15720384. Its totient is φ = 9825120.

The previous prime is 12608977. The next prime is 12608983. The reversal of 12608981 is 18980621.

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 12608981 - 2² = 12608977 is a prime.

It is a super-2 number, since 2×12608981² = 317972803716722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12608983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81800 + ... + 81953.

It is an arithmetic number, because the mean of its divisors is an integer number (1965048).

Almost surely, 2^12608981 is an apocalyptic number.

12608981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12608981 is a deficient number, since it is larger than the sum of its proper divisors (3111403).

12608981 is a wasteful number, since it uses less digits than its factorization.

12608981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163771.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 12608981 is about 3550.9126995746. The cubic root of 12608981 is about 232.7519510213.

The spelling of 12608981 in words is "twelve million, six hundred eight thousand, nine hundred eighty-one".