12499998 has 96 divisors (see below), whose sum is σ = 32060448. Its totient is φ = 3225600.

The previous prime is 12499987. The next prime is 12499999. The reversal of 12499998 is 89999421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 12499998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12499999) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204888 + ... + 204948.

It is an arithmetic number, because the mean of its divisors is an integer number (333963).

Almost surely, 2^12499998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12499998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16030224).

12499998 is an abundant number, since it is smaller than the sum of its proper divisors (19560450).

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

12499998 is a wasteful number, since it uses less digits than its factorization.

12499998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 131 counting only the distinct ones).

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

The square root of 12499998 is about 3535.5336230900. The cubic root of 12499998 is about 232.0794293031.

The spelling of 12499998 in words is "twelve million, four hundred ninety-nine thousand, nine hundred ninety-eight".