1315289 has 2 divisors, whose sum is σ = 1315290. Its totient is φ = 1315288.

The previous prime is 1315283. The next prime is 1315291. The reversal of 1315289 is 9825131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1247689 + 67600 = 1117^2 + 260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315289 is a prime.

Together with 1315291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1315283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657644 + 657645.

It is an arithmetic number, because the mean of its divisors is an integer number (657645).

2^1315289 is an apocalyptic number.

It is an amenable number.

1315289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315289 is an equidigital number, since it uses as much as digits as its factorization.

1315289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 1315289 is about 1146.8604971835. The cubic root of 1315289 is about 109.5654758772.

The spelling of 1315289 in words is "one million, three hundred fifteen thousand, two hundred eighty-nine".