1315563 has 4 divisors (see below), whose sum is σ = 1754088. Its totient is φ = 877040.

The previous prime is 1315553. The next prime is 1315591. The reversal of 1315563 is 3655131.

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

It is a cyclic number.

It is not a de Polignac number, because 1315563 - 2¹⁰ = 1314539 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1315543) 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, 219258 + ... + 219263.

It is an arithmetic number, because the mean of its divisors is an integer number (438522).

2^1315563 is an apocalyptic number.

1315563 is a deficient number, since it is larger than the sum of its proper divisors (438525).

1315563 is an equidigital number, since it uses as much as digits as its factorization.

1315563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438524.

The product of its digits is 1350, while the sum is 24.

The square root of 1315563 is about 1146.9799475143. The cubic root of 1315563 is about 109.5730835477.

It can be divided in two parts, 13 and 15563, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 1315563 in words is "one million, three hundred fifteen thousand, five hundred sixty-three".