12981751 has 2 divisors, whose sum is σ = 12981752. Its totient is φ = 12981750.

The previous prime is 12981737. The next prime is 12981797. The reversal of 12981751 is 15718921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12981751 - 2⁷ = 12981623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12981151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6490875 + 6490876.

It is an arithmetic number, because the mean of its divisors is an integer number (6490876).

Almost surely, 2^12981751 is an apocalyptic number.

12981751 is a deficient number, since it is larger than the sum of its proper divisors (1).

12981751 is an equidigital number, since it uses as much as digits as its factorization.

12981751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 34.

The square root of 12981751 is about 3603.0197057468. The cubic root of 12981751 is about 235.0233928727.

The spelling of 12981751 in words is "twelve million, nine hundred eighty-one thousand, seven hundred fifty-one".