12651655 has 16 divisors (see below), whose sum is σ = 16166304. Its totient is φ = 9472000.

The previous prime is 12651643. The next prime is 12651659. The reversal of 12651655 is 55615621.

It is not a de Polignac number, because 12651655 - 2⁵ = 12651623 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 (12651659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21039 + ... + 21631.

It is an arithmetic number, because the mean of its divisors is an integer number (1010394).

Almost surely, 2^12651655 is an apocalyptic number.

12651655 is a deficient number, since it is larger than the sum of its proper divisors (3514649).

12651655 is a wasteful number, since it uses less digits than its factorization.

12651655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its digits is 9000, while the sum is 31.

The square root of 12651655 is about 3556.9165016908. The cubic root of 12651655 is about 233.0142316026.

The spelling of 12651655 in words is "twelve million, six hundred fifty-one thousand, six hundred fifty-five".