12880015 has 4 divisors (see below), whose sum is σ = 15456024. Its totient is φ = 10304008.

The previous prime is 12880009. The next prime is 12880019. The reversal of 12880015 is 51008821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12880015 - 2⁵ = 12879983 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 (12880019) 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, 1287997 + ... + 1288006.

It is an arithmetic number, because the mean of its divisors is an integer number (3864006).

Almost surely, 2^12880015 is an apocalyptic number.

12880015 is a deficient number, since it is larger than the sum of its proper divisors (2576009).

12880015 is an equidigital number, since it uses as much as digits as its factorization.

12880015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576008.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 12880015 is about 3588.8737787780. The cubic root of 12880015 is about 234.4078345702.

Adding to 12880015 its reverse (51008821), we get a palindrome (63888836).

The spelling of 12880015 in words is "twelve million, eight hundred eighty thousand, fifteen".