12499917 has 8 divisors (see below), whose sum is σ = 16949280. Its totient is φ = 8191920.

The previous prime is 12499909. The next prime is 12499919. The reversal of 12499917 is 71999421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12499917 - 2³ = 12499909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12499919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35134 + ... + 35487.

It is an arithmetic number, because the mean of its divisors is an integer number (2118660).

Almost surely, 2^12499917 is an apocalyptic number.

It is an amenable number.

12499917 is a deficient number, since it is larger than the sum of its proper divisors (4449363).

12499917 is an equidigital number, since it uses as much as digits as its factorization.

12499917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70683.

The product of its digits is 40824, while the sum is 42.

The square root of 12499917 is about 3535.5221679407. The cubic root of 12499917 is about 232.0789280103.

The spelling of 12499917 in words is "twelve million, four hundred ninety-nine thousand, nine hundred seventeen".