12523257 has 12 divisors (see below), whose sum is σ = 18147220. Its totient is φ = 8322048.

The previous prime is 12523253. The next prime is 12523283. The reversal of 12523257 is 75232521.

It can be written as a sum of positive squares in 2 ways, for example, as 5103081 + 7420176 = 2259^2 + 2724^2 .

It is not a de Polignac number, because 12523257 - 2² = 12523253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12523257.

It is not an unprimeable number, because it can be changed into a prime (12523253) 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, 969 + ... + 5097.

Almost surely, 2^12523257 is an apocalyptic number.

It is an amenable number.

12523257 is a deficient number, since it is larger than the sum of its proper divisors (5623963).

12523257 is a wasteful number, since it uses less digits than its factorization.

12523257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472 (or 4469 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 12523257 is about 3538.8214139739. The cubic root of 12523257 is about 232.2232850831.

Adding to 12523257 its reverse (75232521), we get a palindrome (87755778).

The spelling of 12523257 in words is "twelve million, five hundred twenty-three thousand, two hundred fifty-seven".