12981612 has 24 divisors (see below), whose sum is σ = 34617856. Its totient is φ = 3709008.

The previous prime is 12981611. The next prime is 12981613. The reversal of 12981612 is 21618921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12981611) and next prime (12981613).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12981612.

It is not an unprimeable number, because it can be changed into a prime (12981611) 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, 77188 + ... + 77355.

Almost surely, 2^12981612 is an apocalyptic number.

12981612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12981612 is an abundant number, since it is smaller than the sum of its proper divisors (21636244).

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

12981612 is a wasteful number, since it uses less digits than its factorization.

12981612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154557 (or 154555 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 12981612 is about 3603.0004163197. Note that the first 3 decimals coincide. The cubic root of 12981612 is about 235.0225540448.

The spelling of 12981612 in words is "twelve million, nine hundred eighty-one thousand, six hundred twelve".