1315591 has 2 divisors, whose sum is σ = 1315592. Its totient is φ = 1315590.

The previous prime is 1315553. The next prime is 1315597. The reversal of 1315591 is 1955131.

It is a strong prime.

It is an emirp because it is prime and its reverse (1955131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1315591 - 2⁷ = 1315463 is a prime.

1315591 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315597) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657795 + 657796.

It is an arithmetic number, because the mean of its divisors is an integer number (657796).

2^1315591 is an apocalyptic number.

1315591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315591 is an equidigital number, since it uses as much as digits as its factorization.

1315591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 675, while the sum is 25.

The square root of 1315591 is about 1146.9921534169. The cubic root of 1315591 is about 109.5738609144.

The spelling of 1315591 in words is "one million, three hundred fifteen thousand, five hundred ninety-one".