1315643 has 8 divisors (see below), whose sum is σ = 1555680. Its totient is φ = 1088640.

The previous prime is 1315637. The next prime is 1315651. The reversal of 1315643 is 3465131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1315643 - 2⁴ = 1315627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1315603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3038 + ... + 3443.

It is an arithmetic number, because the mean of its divisors is an integer number (194460).

2^1315643 is an apocalyptic number.

1315643 is a deficient number, since it is larger than the sum of its proper divisors (240037).

1315643 is an equidigital number, since it uses as much as digits as its factorization.

1315643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6517.

The product of its digits is 1080, while the sum is 23.

The square root of 1315643 is about 1147.0148211771. The cubic root of 1315643 is about 109.5753045661.

The spelling of 1315643 in words is "one million, three hundred fifteen thousand, six hundred forty-three".