1297239 has 4 divisors (see below), whose sum is σ = 1729656. Its totient is φ = 864824.

The previous prime is 1297229. The next prime is 1297243. The reversal of 1297239 is 9327921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9327921 = 3 ⋅3109307.

It is a cyclic number.

It is not a de Polignac number, because 1297239 - 2⁸ = 1296983 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297229) 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 in 3 ways as a sum of consecutive naturals, for example, 216204 + ... + 216209.

It is an arithmetic number, because the mean of its divisors is an integer number (432414).

2^1297239 is an apocalyptic number.

1297239 is a deficient number, since it is larger than the sum of its proper divisors (432417).

1297239 is an equidigital number, since it uses as much as digits as its factorization.

1297239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432416.

The product of its digits is 6804, while the sum is 33.

The square root of 1297239 is about 1138.9640029430. The cubic root of 1297239 is about 109.0619685226.

The spelling of 1297239 in words is "one million, two hundred ninety-seven thousand, two hundred thirty-nine".