12798981 has 24 divisors (see below), whose sum is σ = 20078240. Its totient is φ = 7809696.

The previous prime is 12798979. The next prime is 12798983. The reversal of 12798981 is 18989721.

It is an interprime number because it is at equal distance from previous prime (12798979) and next prime (12798983).

It is not a de Polignac number, because 12798981 - 2¹ = 12798979 is a prime.

It is a super-2 number, since 2×12798981² = 327627829276722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12798983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15870 + ... + 16656.

Almost surely, 2^12798981 is an apocalyptic number.

It is an amenable number.

12798981 is a deficient number, since it is larger than the sum of its proper divisors (7279259).

12798981 is a wasteful number, since it uses less digits than its factorization.

12798981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 942 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 12798981 is about 3577.5663515859. The cubic root of 12798981 is about 233.9152114463.

The spelling of 12798981 in words is "twelve million, seven hundred ninety-eight thousand, nine hundred eighty-one".