1315397 has 2 divisors, whose sum is σ = 1315398. Its totient is φ = 1315396.

The previous prime is 1315373. The next prime is 1315399. The reversal of 1315397 is 7935131.

1315397 is nontrivially palindromic in base 8.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 923521 + 391876 = 961^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315397 - 2¹² = 1311301 is a prime.

Together with 1315399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657698 + 657699.

It is an arithmetic number, because the mean of its divisors is an integer number (657699).

2^1315397 is an apocalyptic number.

It is an amenable number.

1315397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315397 is an equidigital number, since it uses as much as digits as its factorization.

1315397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2835, while the sum is 29.

The square root of 1315397 is about 1146.9075812811. The cubic root of 1315397 is about 109.5684746472.

The spelling of 1315397 in words is "one million, three hundred fifteen thousand, three hundred ninety-seven".