12997980 has 36 divisors (see below), whose sum is σ = 39427752. Its totient is φ = 3466080.

The previous prime is 12997961. The next prime is 12997987. The reversal of 12997980 is 8979921.

12997980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12997987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35926 + ... + 36285.

Almost surely, 2^12997980 is an apocalyptic number.

12997980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12997980 is an abundant number, since it is smaller than the sum of its proper divisors (26429772).

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

12997980 is a wasteful number, since it uses less digits than its factorization.

12997980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72226 (or 72221 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 12997980 is about 3605.2711409823. The cubic root of 12997980 is about 235.1212894334.

The spelling of 12997980 in words is "twelve million, nine hundred ninety-seven thousand, nine hundred eighty".