12517849 has 2 divisors, whose sum is σ = 12517850. Its totient is φ = 12517848.

The previous prime is 12517847. The next prime is 12517873. The reversal of 12517849 is 94871521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 127449 = 3520^2 + 357^2 .

It is a cyclic number.

It is not a de Polignac number, because 12517849 - 2¹ = 12517847 is a prime.

Together with 12517847, it forms a pair of twin primes.

It is equal to p₈₁₉₇₉₃ and since 12517849 and 819793 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12517847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258924 + 6258925.

It is an arithmetic number, because the mean of its divisors is an integer number (6258925).

Almost surely, 2^12517849 is an apocalyptic number.

It is an amenable number.

12517849 is a deficient number, since it is larger than the sum of its proper divisors (1).

12517849 is an equidigital number, since it uses as much as digits as its factorization.

12517849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 12517849 is about 3538.0572352634. The cubic root of 12517849 is about 232.1898527700.

It can be divided in two parts, 12517 and 849, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 12517849 in words is "twelve million, five hundred seventeen thousand, eight hundred forty-nine".