12981608 has 32 divisors (see below), whose sum is σ = 26273160. Its totient is φ = 5990400.

The previous prime is 12981601. The next prime is 12981611. The reversal of 12981608 is 80618921.

It is a Cunningham number, because it is equal to 3603²-1.

It can be written as a sum of positive squares in 4 ways, for example, as 11546404 + 1435204 = 3398^2 + 1198^2 .

It is not an unprimeable number, because it can be changed into a prime (12981601) 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, 6308 + ... + 8108.

Almost surely, 2^12981608 is an apocalyptic number.

It is an amenable number.

12981608 is an abundant number, since it is smaller than the sum of its proper divisors (13291552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12981608 is a wasteful number, since it uses less digits than its factorization.

12981608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877 (or 1873 counting only the distinct ones).

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

The square root of 12981608 is about 3602.9998612268. Note that the first 3 decimals coincide. The cubic root of 12981608 is about 235.0225299057.

The spelling of 12981608 in words is "twelve million, nine hundred eighty-one thousand, six hundred eight".