12997040 has 40 divisors (see below), whose sum is σ = 34536480. Its totient is φ = 4455936.

The previous prime is 12997037. The next prime is 12997069. The reversal of 12997040 is 4079921.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 12996988 and 12997006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11045 + ... + 12164.

It is an arithmetic number, because the mean of its divisors is an integer number (863412).

Almost surely, 2^12997040 is an apocalyptic number.

12997040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12997040 is an abundant number, since it is smaller than the sum of its proper divisors (21539440).

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

12997040 is a wasteful number, since it uses less digits than its factorization.

12997040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23229 (or 23223 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 12997040 is about 3605.1407739504. The cubic root of 12997040 is about 235.1156213901.

The spelling of 12997040 in words is "twelve million, nine hundred ninety-seven thousand, forty".