12957225 has 24 divisors (see below), whose sum is σ = 22117632. Its totient is φ = 6686400.

The previous prime is 12957223. The next prime is 12957239. The reversal of 12957225 is 52275921.

It is a happy number.

12957225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12957225 - 2¹ = 12957223 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12957223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 462 + ... + 5111.

It is an arithmetic number, because the mean of its divisors is an integer number (921568).

Almost surely, 2^12957225 is an apocalyptic number.

12957225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12957225 is a deficient number, since it is larger than the sum of its proper divisors (9160407).

12957225 is a wasteful number, since it uses less digits than its factorization.

12957225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5617 (or 5612 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 12957225 is about 3599.6145626997. The cubic root of 12957225 is about 234.8752922152.

The spelling of 12957225 in words is "twelve million, nine hundred fifty-seven thousand, two hundred twenty-five".