12640615 has 8 divisors (see below), whose sum is σ = 16335648. Its totient is φ = 9334560.

The previous prime is 12640613. The next prime is 12640619. The reversal of 12640615 is 51604621.

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

It is not a de Polignac number, because 12640615 - 2¹ = 12640613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12640615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97171 + ... + 97300.

It is an arithmetic number, because the mean of its divisors is an integer number (2041956).

Almost surely, 2^12640615 is an apocalyptic number.

12640615 is a deficient number, since it is larger than the sum of its proper divisors (3695033).

12640615 is a wasteful number, since it uses less digits than its factorization.

12640615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194489.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 12640615 is about 3555.3642570066. The cubic root of 12640615 is about 232.9464347877.

The spelling of 12640615 in words is "twelve million, six hundred forty thousand, six hundred fifteen".