12517949 has 4 divisors (see below), whose sum is σ = 12583680. Its totient is φ = 12452220.

The previous prime is 12517943. The next prime is 12517961. The reversal of 12517949 is 94971521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12517949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12517943) 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 in 3 ways as a sum of consecutive naturals, for example, 32579 + ... + 32960.

It is an arithmetic number, because the mean of its divisors is an integer number (3145920).

Almost surely, 2^12517949 is an apocalyptic number.

It is an amenable number.

12517949 is a deficient number, since it is larger than the sum of its proper divisors (65731).

12517949 is an equidigital number, since it uses as much as digits as its factorization.

12517949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65730.

The product of its digits is 22680, while the sum is 38.

The square root of 12517949 is about 3538.0713672847. The cubic root of 12517949 is about 232.1904710584.

The spelling of 12517949 in words is "twelve million, five hundred seventeen thousand, nine hundred forty-nine".