12961799 has 4 divisors (see below), whose sum is σ = 12974040. Its totient is φ = 12949560.

The previous prime is 12961789. The next prime is 12961841. The reversal of 12961799 is 99716921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99716921 = 19 ⋅5248259.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12961799 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 (12961709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4364 + ... + 6705.

It is an arithmetic number, because the mean of its divisors is an integer number (3243510).

Almost surely, 2^12961799 is an apocalyptic number.

12961799 is a deficient number, since it is larger than the sum of its proper divisors (12241).

12961799 is a wasteful number, since it uses less digits than its factorization.

12961799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12240.

The product of its digits is 61236, while the sum is 44.

The square root of 12961799 is about 3600.2498524408. The cubic root of 12961799 is about 234.9029265581.

The spelling of 12961799 in words is "twelve million, nine hundred sixty-one thousand, seven hundred ninety-nine".