1090645 has 8 divisors (see below), whose sum is σ = 1314720. Its totient is φ = 868560.

The previous prime is 1090627. The next prime is 1090681. The reversal of 1090645 is 5460901.

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

It is not a de Polignac number, because 1090645 - 2⁵ = 1090613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1326 + ... + 1984.

It is an arithmetic number, because the mean of its divisors is an integer number (164340).

2^1090645 is an apocalyptic number.

It is an amenable number.

1090645 is a deficient number, since it is larger than the sum of its proper divisors (224075).

1090645 is an equidigital number, since it uses as much as digits as its factorization.

1090645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1090645 is about 1044.3395041843. The cubic root of 1090645 is about 102.9345422535.

The spelling of 1090645 in words is "one million, ninety thousand, six hundred forty-five".