12499989 has 8 divisors (see below), whose sum is σ = 16915680. Its totient is φ = 8208816.

The previous prime is 12499987. The next prime is 12499999. The reversal of 12499989 is 98999421.

It is a happy number.

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

It is not a de Polignac number, because 12499989 - 2¹ = 12499987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12499987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30894 + ... + 31295.

It is an arithmetic number, because the mean of its divisors is an integer number (2114460).

Almost surely, 2^12499989 is an apocalyptic number.

It is an amenable number.

12499989 is a deficient number, since it is larger than the sum of its proper divisors (4415691).

12499989 is an equidigital number, since it uses as much as digits as its factorization.

12499989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62259.

The product of its digits is 419904, while the sum is 51.

The square root of 12499989 is about 3535.5323502975. The cubic root of 12499989 is about 232.0793736040.

The spelling of 12499989 in words is "twelve million, four hundred ninety-nine thousand, nine hundred eighty-nine".