12881597 has 18 divisors (see below), whose sum is σ = 14439438. Its totient is φ = 11484928.

The previous prime is 12881581. The next prime is 12881599. The reversal of 12881597 is 79518821.

It can be written as a sum of positive squares in 9 ways, for example, as 22201 + 12859396 = 149^2 + 3586^2 .

It is not a de Polignac number, because 12881597 - 2⁴ = 12881581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12881599) 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 17 ways as a sum of consecutive naturals, for example, 243023 + ... + 243075.

It is an arithmetic number, because the mean of its divisors is an integer number (802191).

Almost surely, 2^12881597 is an apocalyptic number.

12881597 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12881597 is a deficient number, since it is larger than the sum of its proper divisors (1557841).

12881597 is an equidigital number, since it uses as much as digits as its factorization.

12881597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 99 counting only the distinct ones).

The product of its digits is 40320, while the sum is 41.

The square root of 12881597 is about 3589.0941754153. The cubic root of 12881597 is about 234.4174312985.

The spelling of 12881597 in words is "twelve million, eight hundred eighty-one thousand, five hundred ninety-seven".