12499900 has 54 divisors (see below), whose sum is σ = 31565688. Its totient is φ = 4284000.

The previous prime is 12499897. The next prime is 12499901. The reversal of 12499900 is 999421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12499901) 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 17 ways as a sum of consecutive naturals, for example, 3625 + ... + 6175.

Almost surely, 2^12499900 is an apocalyptic number.

12499900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12499900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15782844).

12499900 is an abundant number, since it is smaller than the sum of its proper divisors (19065788).

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

12499900 is a wasteful number, since it uses less digits than its factorization.

12499900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579 (or 2565 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 12499900 is about 3535.5197637688. The cubic root of 12499900 is about 232.0788228005.

The spelling of 12499900 in words is "twelve million, four hundred ninety-nine thousand, nine hundred".