12897970 has 16 divisors (see below), whose sum is σ = 23431320. Its totient is φ = 5111424.

The previous prime is 12897961. The next prime is 12897971. The reversal of 12897970 is 7979821.

It is a happy number.

12897970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12794929 + 103041 = 3577^2 + 321^2 .

It is not an unprimeable number, because it can be changed into a prime (12897971) 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, 4827 + ... + 7006.

Almost surely, 2^12897970 is an apocalyptic number.

12897970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12897970 is a deficient number, since it is larger than the sum of its proper divisors (10533350).

12897970 is a wasteful number, since it uses less digits than its factorization.

12897970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11949.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 12897970 is about 3591.3743887264. The cubic root of 12897970 is about 234.5167070746.

The spelling of 12897970 in words is "twelve million, eight hundred ninety-seven thousand, nine hundred seventy".