1315909 has 4 divisors (see below), whose sum is σ = 1503904. Its totient is φ = 1127916.

The previous prime is 1315907. The next prime is 1315927. The reversal of 1315909 is 9095131.

1315909 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1315909 - 2¹ = 1315907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315901) 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 in 3 ways as a sum of consecutive naturals, for example, 93987 + ... + 94000.

It is an arithmetic number, because the mean of its divisors is an integer number (375976).

2^1315909 is an apocalyptic number.

It is an amenable number.

1315909 is a deficient number, since it is larger than the sum of its proper divisors (187995).

1315909 is an equidigital number, since it uses as much as digits as its factorization.

1315909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187994.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 1315909 is about 1147.1307684828. The cubic root of 1315909 is about 109.5826888051.

The spelling of 1315909 in words is "one million, three hundred fifteen thousand, nine hundred nine".