1297397 has 2 divisors, whose sum is σ = 1297398. Its totient is φ = 1297396.

The previous prime is 1297393. The next prime is 1297399. The reversal of 1297397 is 7937921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 758641 + 538756 = 871^2 + 734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297397 - 2² = 1297393 is a prime.

Together with 1297399, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1297397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648698 + 648699.

It is an arithmetic number, because the mean of its divisors is an integer number (648699).

2^1297397 is an apocalyptic number.

It is an amenable number.

1297397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297397 is an equidigital number, since it uses as much as digits as its factorization.

1297397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 38.

The square root of 1297397 is about 1139.0333621102. The cubic root of 1297397 is about 109.0663961548.

The spelling of 1297397 in words is "one million, two hundred ninety-seven thousand, three hundred ninety-seven".