12722865 has 16 divisors (see below), whose sum is σ = 21014016. Its totient is φ = 6566400.

The previous prime is 12722863. The next prime is 12722873. The reversal of 12722865 is 56822721.

It is not a de Polignac number, because 12722865 - 2¹ = 12722863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12722863) 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, 13216 + ... + 14145.

It is an arithmetic number, because the mean of its divisors is an integer number (1313376).

Almost surely, 2^12722865 is an apocalyptic number.

12722865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12722865 is a deficient number, since it is larger than the sum of its proper divisors (8291151).

12722865 is a wasteful number, since it uses less digits than its factorization.

12722865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27400.

The product of its digits is 13440, while the sum is 33.

The square root of 12722865 is about 3566.9125304666. The cubic root of 12722865 is about 233.4505884591.

The spelling of 12722865 in words is "twelve million, seven hundred twenty-two thousand, eight hundred sixty-five".