12858257 has 2 divisors, whose sum is σ = 12858258. Its totient is φ = 12858256.

The previous prime is 12858233. The next prime is 12858271. The reversal of 12858257 is 75285821.

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., 6948496 + 5909761 = 2636^2 + 2431^2 .

It is a cyclic number.

It is not a de Polignac number, because 12858257 - 2¹⁸ = 12596113 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12858257.

It is not a weakly prime, because it can be changed into another prime (12858217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6429128 + 6429129.

It is an arithmetic number, because the mean of its divisors is an integer number (6429129).

Almost surely, 2^12858257 is an apocalyptic number.

It is an amenable number.

12858257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12858257 is an equidigital number, since it uses as much as digits as its factorization.

12858257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44800, while the sum is 38.

The square root of 12858257 is about 3585.8411844364. The cubic root of 12858257 is about 234.2757663937.

It can be divided in two parts, 128 and 58257, that added together give a palindrome (58385).

The spelling of 12858257 in words is "twelve million, eight hundred fifty-eight thousand, two hundred fifty-seven".