12897655 has 8 divisors (see below), whose sum is σ = 15497712. Its totient is φ = 10304448.

The previous prime is 12897649. The next prime is 12897659. The reversal of 12897655 is 55679821.

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

It is a cyclic number.

It is not a de Polignac number, because 12897655 - 2⁵ = 12897623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12897659) 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, 4467 + ... + 6763.

It is an arithmetic number, because the mean of its divisors is an integer number (1937214).

Almost surely, 2^12897655 is an apocalyptic number.

12897655 is a deficient number, since it is larger than the sum of its proper divisors (2600057).

12897655 is a wasteful number, since it uses less digits than its factorization.

12897655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425.

The product of its digits is 151200, while the sum is 43.

The square root of 12897655 is about 3591.3305333817. The cubic root of 12897655 is about 234.5147979017.

The spelling of 12897655 in words is "twelve million, eight hundred ninety-seven thousand, six hundred fifty-five".