12981398 has 4 divisors (see below), whose sum is σ = 19472100. Its totient is φ = 6490698.

The previous prime is 12981391. The next prime is 12981403. The reversal of 12981398 is 89318921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12981391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245348 + ... + 3245351.

It is an arithmetic number, because the mean of its divisors is an integer number (4868025).

Almost surely, 2^12981398 is an apocalyptic number.

12981398 is a deficient number, since it is larger than the sum of its proper divisors (6490702).

12981398 is an equidigital number, since it uses as much as digits as its factorization.

12981398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490701.

The product of its digits is 31104, while the sum is 41.

The square root of 12981398 is about 3602.9707187264. The cubic root of 12981398 is about 235.0212626000.

The spelling of 12981398 in words is "twelve million, nine hundred eighty-one thousand, three hundred ninety-eight".