12974891281 has 4 divisors (see below), whose sum is σ = 14154426864. Its totient is φ = 11795355700.

The previous prime is 12974891239. The next prime is 12974891297. The reversal of 12974891281 is 18219847921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18219847921 = 11 ⋅1656349811.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12974891281 is a prime.

It is a super-2 number, since 2×12974891281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12974891221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589767775 + ... + 589767796.

It is an arithmetic number, because the mean of its divisors is an integer number (3538606716).

Almost surely, 2^12974891281 is an apocalyptic number.

12974891281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12974891281 is a deficient number, since it is larger than the sum of its proper divisors (1179535583).

12974891281 is a wasteful number, since it uses less digits than its factorization.

12974891281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179535582.

The product of its digits is 580608, while the sum is 52.

The spelling of 12974891281 in words is "twelve billion, nine hundred seventy-four million, eight hundred ninety-one thousand, two hundred eighty-one".