1315771 has 2 divisors, whose sum is σ = 1315772. Its totient is φ = 1315770.

The previous prime is 1315747. The next prime is 1315781. The reversal of 1315771 is 1775131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1315771 - 2¹¹ = 1313723 is a prime.

It is not a weakly prime, because it can be changed into another prime (1315711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657885 + 657886.

It is an arithmetic number, because the mean of its divisors is an integer number (657886).

2^1315771 is an apocalyptic number.

1315771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315771 is an equidigital number, since it uses as much as digits as its factorization.

1315771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 735, while the sum is 25.

The square root of 1315771 is about 1147.0706168323. The cubic root of 1315771 is about 109.5788580084.

The spelling of 1315771 in words is "one million, three hundred fifteen thousand, seven hundred seventy-one".