1296839 has 2 divisors, whose sum is σ = 1296840. Its totient is φ = 1296838.

The previous prime is 1296833. The next prime is 1296877. The reversal of 1296839 is 9386921.

1296839 is nontrivially palindromic in base 9.

It is an a-pointer prime, because the next prime (1296877) can be obtained adding 1296839 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1296839 - 2⁸ = 1296583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648419 + 648420.

It is an arithmetic number, because the mean of its divisors is an integer number (648420).

2^1296839 is an apocalyptic number.

1296839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296839 is an equidigital number, since it uses as much as digits as its factorization.

1296839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 1296839 is about 1138.7883912299. The cubic root of 1296839 is about 109.0507577197.

The spelling of 1296839 in words is "one million, two hundred ninety-six thousand, eight hundred thirty-nine".