12521998 has 8 divisors (see below), whose sum is σ = 18798120. Its totient is φ = 6255960.

The previous prime is 12521989. The next prime is 12522011. The reversal of 12521998 is 89912521.

12521998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3033 + ... + 5851.

It is an arithmetic number, because the mean of its divisors is an integer number (2349765).

Almost surely, 2^12521998 is an apocalyptic number.

12521998 is a deficient number, since it is larger than the sum of its proper divisors (6276122).

12521998 is a wasteful number, since it uses less digits than its factorization.

12521998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042.

The product of its digits is 12960, while the sum is 37.

The square root of 12521998 is about 3538.6435254204. The cubic root of 12521998 is about 232.2155027914.

The spelling of 12521998 in words is "twelve million, five hundred twenty-one thousand, nine hundred ninety-eight".