12799961 has 4 divisors (see below), whose sum is σ = 12810000. Its totient is φ = 12789924.

The previous prime is 12799957. The next prime is 12799973. The reversal of 12799961 is 16999721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16999721 = 197 ⋅86293.

It is a cyclic number.

It is not a de Polignac number, because 12799961 - 2² = 12799957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12799921) 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, 2771 + ... + 5768.

It is an arithmetic number, because the mean of its divisors is an integer number (3202500).

Almost surely, 2^12799961 is an apocalyptic number.

It is an amenable number.

12799961 is a deficient number, since it is larger than the sum of its proper divisors (10039).

12799961 is an equidigital number, since it uses as much as digits as its factorization.

12799961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10038.

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

The square root of 12799961 is about 3577.7033135798. The cubic root of 12799961 is about 233.9211814803.

The spelling of 12799961 in words is "twelve million, seven hundred ninety-nine thousand, nine hundred sixty-one".