12997261 has 8 divisors (see below), whose sum is σ = 13201344. Its totient is φ = 12794880.

The previous prime is 12997253. The next prime is 12997279. The reversal of 12997261 is 16279921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12997261 - 2³ = 12997253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12997261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12997291) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26226 + ... + 26716.

It is an arithmetic number, because the mean of its divisors is an integer number (1650168).

Almost surely, 2^12997261 is an apocalyptic number.

It is an amenable number.

12997261 is a deficient number, since it is larger than the sum of its proper divisors (204083).

12997261 is a wasteful number, since it uses less digits than its factorization.

12997261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its digits is 13608, while the sum is 37.

The square root of 12997261 is about 3605.1714244957. The cubic root of 12997261 is about 235.1169540078.

The spelling of 12997261 in words is "twelve million, nine hundred ninety-seven thousand, two hundred sixty-one".