12897642 has 8 divisors (see below), whose sum is σ = 25795296. Its totient is φ = 4299212.

The previous prime is 12897631. The next prime is 12897649. The reversal of 12897642 is 24679821.

12897642 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

12897642 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 12897642.

It is not an unprimeable number, because it can be changed into a prime (12897649) 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, 1074798 + ... + 1074809.

It is an arithmetic number, because the mean of its divisors is an integer number (3224412).

Almost surely, 2^12897642 is an apocalyptic number.

12897642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12897642 is a wasteful number, since it uses less digits than its factorization.

12897642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149612.

The product of its digits is 48384, while the sum is 39.

The square root of 12897642 is about 3591.3287234671. The cubic root of 12897642 is about 234.5147191098.

The spelling of 12897642 in words is "twelve million, eight hundred ninety-seven thousand, six hundred forty-two".