12015257 has 2 divisors, whose sum is σ = 12015258. Its totient is φ = 12015256.

The previous prime is 12015233. The next prime is 12015271. The reversal of 12015257 is 75251021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10601536 + 1413721 = 3256^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 12015257 - 2⁸ = 12015001 is a prime.

It is not a weakly prime, because it can be changed into another prime (12015217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6007628 + 6007629.

It is an arithmetic number, because the mean of its divisors is an integer number (6007629).

Almost surely, 2^12015257 is an apocalyptic number.

It is an amenable number.

12015257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12015257 is an equidigital number, since it uses as much as digits as its factorization.

12015257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 12015257 is about 3466.3030738815. The cubic root of 12015257 is about 229.0398346701.

Adding to 12015257 its reverse (75251021), we get a palindrome (87266278).

The spelling of 12015257 in words is "twelve million, fifteen thousand, two hundred fifty-seven".