1315505 has 4 divisors (see below), whose sum is σ = 1578612. Its totient is φ = 1052400.

The previous prime is 1315493. The next prime is 1315507. The reversal of 1315505 is 5055131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 795664 + 519841 = 892^2 + 721^2 .

It is not a de Polignac number, because 1315505 - 2⁶ = 1315441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131546 + ... + 131555.

It is an arithmetic number, because the mean of its divisors is an integer number (394653).

2^1315505 is an apocalyptic number.

It is an amenable number.

1315505 is a deficient number, since it is larger than the sum of its proper divisors (263107).

1315505 is an equidigital number, since it uses as much as digits as its factorization.

1315505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263106.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 1315505 is about 1146.9546634458. The cubic root of 1315505 is about 109.5714732530.

The spelling of 1315505 in words is "one million, three hundred fifteen thousand, five hundred five".