1297139 has 2 divisors, whose sum is σ = 1297140. Its totient is φ = 1297138.

The previous prime is 1297129. The next prime is 1297147. The reversal of 1297139 is 9317921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1297139 - 2⁴ = 1297123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1297129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648569 + 648570.

It is an arithmetic number, because the mean of its divisors is an integer number (648570).

2^1297139 is an apocalyptic number.

1297139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297139 is an equidigital number, since it uses as much as digits as its factorization.

1297139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 32.

The square root of 1297139 is about 1138.9201025533. The cubic root of 1297139 is about 109.0591660379.

The spelling of 1297139 in words is "one million, two hundred ninety-seven thousand, one hundred thirty-nine".