12720998 has 16 divisors (see below), whose sum is σ = 20358864. Its totient is φ = 5940480.

The previous prime is 12720997. The next prime is 12721019. The reversal of 12720998 is 89902721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3293 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (1272429).

Almost surely, 2^12720998 is an apocalyptic number.

12720998 is a deficient number, since it is larger than the sum of its proper divisors (7637866).

12720998 is a wasteful number, since it uses less digits than its factorization.

12720998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2887.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 12720998 is about 3566.6508099336. The cubic root of 12720998 is about 233.4391687679.

The spelling of 12720998 in words is "twelve million, seven hundred twenty thousand, nine hundred ninety-eight".