12255817 has 16 divisors (see below), whose sum is σ = 15093760. Its totient is φ = 9716112.

The previous prime is 12255811. The next prime is 12255821. The reversal of 12255817 is 71855221.

It is not a de Polignac number, because 12255817 - 2¹⁵ = 12223049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12255811) 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, 4648 + ... + 6790.

It is an arithmetic number, because the mean of its divisors is an integer number (943360).

Almost surely, 2^12255817 is an apocalyptic number.

It is an amenable number.

12255817 is a deficient number, since it is larger than the sum of its proper divisors (2837943).

12255817 is a wasteful number, since it uses less digits than its factorization.

12255817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212.

The product of its digits is 5600, while the sum is 31.

The square root of 12255817 is about 3500.8309013718. The cubic root of 12255817 is about 230.5582971390.

The spelling of 12255817 in words is "twelve million, two hundred fifty-five thousand, eight hundred seventeen".