12565216 has 12 divisors (see below), whose sum is σ = 24737832. Its totient is φ = 6282592.

The previous prime is 12565211. The next prime is 12565219. The reversal of 12565216 is 61256521.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196300 + ... + 196363.

It is an arithmetic number, because the mean of its divisors is an integer number (2061486).

Almost surely, 2^12565216 is an apocalyptic number.

12565216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12565216 is a deficient number, since it is larger than the sum of its proper divisors (12172616).

12565216 is an equidigital number, since it uses as much as digits as its factorization.

12565216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392673 (or 392665 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 12565216 is about 3544.7448427214. The cubic root of 12565216 is about 232.4823496063.

It can be divided in two parts, 125 and 65216, that added together give a triangular number (65341 = T₃₆₁).

The spelling of 12565216 in words is "twelve million, five hundred sixty-five thousand, two hundred sixteen".