12986225 has 18 divisors (see below), whose sum is σ = 18733734. Its totient is φ = 8904000.

The previous prime is 12986221. The next prime is 12986227. The reversal of 12986225 is 52268921.

It is a happy number.

12986225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 2436721 + 10549504 = 1561^2 + 3248^2 .

It is not a de Polignac number, because 12986225 - 2² = 12986221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12986221) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4076 + ... + 6525.

It is an arithmetic number, because the mean of its divisors is an integer number (1040763).

Almost surely, 2^12986225 is an apocalyptic number.

It is an amenable number.

12986225 is a deficient number, since it is larger than the sum of its proper divisors (5747509).

12986225 is a wasteful number, since it uses less digits than its factorization.

12986225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10625 (or 10613 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 12986225 is about 3603.6405203627. The cubic root of 12986225 is about 235.0503890740.

The spelling of 12986225 in words is "twelve million, nine hundred eighty-six thousand, two hundred twenty-five".