1297279 has 2 divisors, whose sum is σ = 1297280. Its totient is φ = 1297278.

The previous prime is 1297273. The next prime is 1297297. The reversal of 1297279 is 9727921.

Together with next prime (1297297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1297279 - 2³ = 1297271 is a prime.

1297279 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648639 + 648640.

It is an arithmetic number, because the mean of its divisors is an integer number (648640).

2^1297279 is an apocalyptic number.

1297279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297279 is an equidigital number, since it uses as much as digits as its factorization.

1297279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 37.

The square root of 1297279 is about 1138.9815626251. The cubic root of 1297279 is about 109.0630894761.

The spelling of 1297279 in words is "one million, two hundred ninety-seven thousand, two hundred seventy-nine".