12981775 has 24 divisors (see below), whose sum is σ = 17034624. Its totient is φ = 9794400.

The previous prime is 12981751. The next prime is 12981797. The reversal of 12981775 is 57718921.

It is not a de Polignac number, because 12981775 - 2⁹ = 12981263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61420 + ... + 61630.

It is an arithmetic number, because the mean of its divisors is an integer number (709776).

Almost surely, 2^12981775 is an apocalyptic number.

12981775 is a deficient number, since it is larger than the sum of its proper divisors (4052849).

12981775 is a wasteful number, since it uses less digits than its factorization.

12981775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 346 counting only the distinct ones).

The product of its digits is 35280, while the sum is 40.

The square root of 12981775 is about 3603.0230362849. The cubic root of 12981775 is about 235.0235377058.

The spelling of 12981775 in words is "twelve million, nine hundred eighty-one thousand, seven hundred seventy-five".