12851998 has 4 divisors (see below), whose sum is σ = 19278000. Its totient is φ = 6425998.

The previous prime is 12851981. The next prime is 12852001. The reversal of 12851998 is 89915821.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3212998 + ... + 3213001.

It is an arithmetic number, because the mean of its divisors is an integer number (4819500).

Almost surely, 2^12851998 is an apocalyptic number.

12851998 is a deficient number, since it is larger than the sum of its proper divisors (6426002).

12851998 is an equidigital number, since it uses as much as digits as its factorization.

12851998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6426001.

The product of its digits is 51840, while the sum is 43.

The square root of 12851998 is about 3584.9683401670. The cubic root of 12851998 is about 234.2377475029.

The spelling of 12851998 in words is "twelve million, eight hundred fifty-one thousand, nine hundred ninety-eight".