12257397 has 12 divisors (see below), whose sum is σ = 18184140. Its totient is φ = 7950528.

The previous prime is 12257389. The next prime is 12257407. The reversal of 12257397 is 79375221.

12257397 is a `hidden beast` number, since 12 + 257 + 397 = 666.

12257397 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8071281 + 4186116 = 2841^2 + 2046^2 .

It is not a de Polignac number, because 12257397 - 2³ = 12257389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12257317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18072 + ... + 18737.

It is an arithmetic number, because the mean of its divisors is an integer number (1515345).

Almost surely, 2^12257397 is an apocalyptic number.

It is an amenable number.

12257397 is a deficient number, since it is larger than the sum of its proper divisors (5926743).

12257397 is a wasteful number, since it uses less digits than its factorization.

12257397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36852 (or 36849 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 12257397 is about 3501.0565548131. The cubic root of 12257397 is about 230.5682044468.

The spelling of 12257397 in words is "twelve million, two hundred fifty-seven thousand, three hundred ninety-seven".