1315915 has 4 divisors (see below), whose sum is σ = 1579104. Its totient is φ = 1052728.

The previous prime is 1315907. The next prime is 1315927. The reversal of 1315915 is 5195131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5195131 = 43 ⋅120817.

It is a cyclic number.

It is not a de Polignac number, because 1315915 - 2³ = 1315907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1315915.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131587 + ... + 131596.

It is an arithmetic number, because the mean of its divisors is an integer number (394776).

2^1315915 is an apocalyptic number.

1315915 is a deficient number, since it is larger than the sum of its proper divisors (263189).

1315915 is an equidigital number, since it uses as much as digits as its factorization.

1315915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263188.

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

The square root of 1315915 is about 1147.1333837004. The cubic root of 1315915 is about 109.5828553554.

The spelling of 1315915 in words is "one million, three hundred fifteen thousand, nine hundred fifteen".