12307257 has 12 divisors (see below), whose sum is σ = 18211284. Its totient is φ = 8004480.

The previous prime is 12307237. The next prime is 12307261. The reversal of 12307257 is 75270321.

It can be written as a sum of positive squares in 2 ways, for example, as 876096 + 11431161 = 936^2 + 3381^2 .

It is not a de Polignac number, because 12307257 - 2¹⁵ = 12274489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12307257.

It is not an unprimeable number, because it can be changed into a prime (12307237) 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, 16308 + ... + 17045.

It is an arithmetic number, because the mean of its divisors is an integer number (1517607).

Almost surely, 2^12307257 is an apocalyptic number.

It is an amenable number.

12307257 is a deficient number, since it is larger than the sum of its proper divisors (5904027).

12307257 is a wasteful number, since it uses less digits than its factorization.

12307257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33400 (or 33397 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 12307257 is about 3508.1700357879. The cubic root of 12307257 is about 230.8804126048.

Adding to 12307257 its reverse (75270321), we get a palindrome (87577578).

The spelling of 12307257 in words is "twelve million, three hundred seven thousand, two hundred fifty-seven".