12981516 has 12 divisors (see below), whose sum is σ = 30290232. Its totient is φ = 4327168.

The previous prime is 12981511. The next prime is 12981539. The reversal of 12981516 is 61518921.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (12981511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540885 + ... + 540908.

It is an arithmetic number, because the mean of its divisors is an integer number (2524186).

Almost surely, 2^12981516 is an apocalyptic number.

It is an amenable number.

12981516 is an abundant number, since it is smaller than the sum of its proper divisors (17308716).

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

12981516 is a wasteful number, since it uses less digits than its factorization.

12981516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081800 (or 1081798 counting only the distinct ones).

The product of its digits is 4320, while the sum is 33.

The square root of 12981516 is about 3602.9870940651. The cubic root of 12981516 is about 235.0219747068.

The spelling of 12981516 in words is "twelve million, nine hundred eighty-one thousand, five hundred sixteen".