1115643 has 8 divisors (see below), whose sum is σ = 1493008. Its totient is φ = 741024.

The previous prime is 1115641. The next prime is 1115657. The reversal of 1115643 is 3465111.

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

It is not a de Polignac number, because 1115643 - 2¹ = 1115641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621 + ... + 1617.

It is an arithmetic number, because the mean of its divisors is an integer number (186626).

2^1115643 is an apocalyptic number.

1115643 is a deficient number, since it is larger than the sum of its proper divisors (377365).

1115643 is an equidigital number, since it uses as much as digits as its factorization.

1115643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373.

The product of its digits is 360, while the sum is 21.

The square root of 1115643 is about 1056.2400295387. The cubic root of 1115643 is about 103.7150421733.

The spelling of 1115643 in words is "one million, one hundred fifteen thousand, six hundred forty-three".