1090445 has 6 divisors (see below), whose sum is σ = 1311342. Its totient is φ = 870488.

The previous prime is 1090423. The next prime is 1090457. The reversal of 1090445 is 5440901.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 872356 + 218089 = 934^2 + 467^2 .

It is not a de Polignac number, because 1090445 - 2⁶ = 1090381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1090445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2102 + ... + 2568.

It is an arithmetic number, because the mean of its divisors is an integer number (218557).

2^1090445 is an apocalyptic number.

It is an amenable number.

1090445 is a deficient number, since it is larger than the sum of its proper divisors (220897).

1090445 is an frugal number, since it uses more digits than its factorization.

1090445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1090445 is about 1044.2437454924. The cubic root of 1090445 is about 102.9282499015.

Multiplying 1090445 by its product of nonzero digits (720), we get a square (785120400 = 28020²).

The spelling of 1090445 in words is "one million, ninety thousand, four hundred forty-five".