12499890 has 32 divisors (see below), whose sum is σ = 32308416. Its totient is φ = 3076800.

The previous prime is 12499873. The next prime is 12499897. The reversal of 12499890 is 9899421.

It is not an unprimeable number, because it can be changed into a prime (12499897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15636 + ... + 16415.

It is an arithmetic number, because the mean of its divisors is an integer number (1009638).

Almost surely, 2^12499890 is an apocalyptic number.

12499890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12499890 is an abundant number, since it is smaller than the sum of its proper divisors (19808526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12499890 is a wasteful number, since it uses less digits than its factorization.

12499890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32074.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 12499890 is about 3535.5183495493. The cubic root of 12499890 is about 232.0787609123.

The spelling of 12499890 in words is "twelve million, four hundred ninety-nine thousand, eight hundred ninety".