1313563 has 4 divisors (see below), whose sum is σ = 1355968. Its totient is φ = 1271160.

The previous prime is 1313467. The next prime is 1313567. The reversal of 1313563 is 3653131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3653131 = 53 ⋅68927.

It is a cyclic number.

It is not a de Polignac number, because 1313563 - 2¹³ = 1305371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313567) 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, 21156 + ... + 21217.

It is an arithmetic number, because the mean of its divisors is an integer number (338992).

2^1313563 is an apocalyptic number.

1313563 is a deficient number, since it is larger than the sum of its proper divisors (42405).

1313563 is an equidigital number, since it uses as much as digits as its factorization.

1313563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42404.

The product of its digits is 810, while the sum is 22.

The square root of 1313563 is about 1146.1077610766. The cubic root of 1313563 is about 109.5175287994.

Adding to 1313563 its reverse (3653131), we get a palindrome (4966694).

The spelling of 1313563 in words is "one million, three hundred thirteen thousand, five hundred sixty-three".