12643970 has 16 divisors (see below), whose sum is σ = 23493888. Its totient is φ = 4894320.

The previous prime is 12643933. The next prime is 12643999. The reversal of 12643970 is 7934621.

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, 20084 + ... + 20703.

It is an arithmetic number, because the mean of its divisors is an integer number (1468368).

Almost surely, 2^12643970 is an apocalyptic number.

12643970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12643970 is a deficient number, since it is larger than the sum of its proper divisors (10849918).

12643970 is a wasteful number, since it uses less digits than its factorization.

12643970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40825.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 12643970 is about 3555.8360479640. The cubic root of 12643970 is about 232.9670420697.

The spelling of 12643970 in words is "twelve million, six hundred forty-three thousand, nine hundred seventy".