1089145 has 4 divisors (see below), whose sum is σ = 1306980. Its totient is φ = 871312.

The previous prime is 1089133. The next prime is 1089161. The reversal of 1089145 is 5419801.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 356409 + 732736 = 597^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089145 - 2⁵ = 1089113 is a prime.

1089145 is a lucky number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 108910 + ... + 108919.

It is an arithmetic number, because the mean of its divisors is an integer number (326745).

2^1089145 is an apocalyptic number.

It is an amenable number.

1089145 is a deficient number, since it is larger than the sum of its proper divisors (217835).

1089145 is an equidigital number, since it uses as much as digits as its factorization.

1089145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217834.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1089145 is about 1043.6210998250. The cubic root of 1089145 is about 102.8873308474.

The spelling of 1089145 in words is "one million, eighty-nine thousand, one hundred forty-five".