12651257 has 2 divisors, whose sum is σ = 12651258. Its totient is φ = 12651256.

The previous prime is 12651253. The next prime is 12651293. The reversal of 12651257 is 75215621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12524521 + 126736 = 3539^2 + 356^2 .

It is a cyclic number.

It is not a de Polignac number, because 12651257 - 2² = 12651253 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12651251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6325628 + 6325629.

It is an arithmetic number, because the mean of its divisors is an integer number (6325629).

Almost surely, 2^12651257 is an apocalyptic number.

It is an amenable number.

12651257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12651257 is an equidigital number, since it uses as much as digits as its factorization.

12651257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 29.

The square root of 12651257 is about 3556.8605539155. The cubic root of 12651257 is about 233.0117881637.

Adding to 12651257 its reverse (75215621), we get a palindrome (87866878).

The spelling of 12651257 in words is "twelve million, six hundred fifty-one thousand, two hundred fifty-seven".