1296122239 has 4 divisors (see below), whose sum is σ = 1296333360. Its totient is φ = 1295911120.

The previous prime is 1296122231. The next prime is 1296122251. The reversal of 1296122239 is 9322216921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9322216921 = 9281 ⋅1004441.

It is a cyclic number.

It is not a de Polignac number, because 1296122239 - 2³ = 1296122231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1296122198 and 1296122207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296122231) 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, 96067 + ... + 108724.

It is an arithmetic number, because the mean of its divisors is an integer number (324083340).

Almost surely, 2^1296122239 is an apocalyptic number.

1296122239 is a deficient number, since it is larger than the sum of its proper divisors (211121).

1296122239 is an equidigital number, since it uses as much as digits as its factorization.

1296122239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211120.

The product of its digits is 23328, while the sum is 37.

The square root of 1296122239 is about 36001.6977238574. The cubic root of 1296122239 is about 1090.3066328630.

The spelling of 1296122239 in words is "one billion, two hundred ninety-six million, one hundred twenty-two thousand, two hundred thirty-nine".