1089045 has 20 divisors (see below), whose sum is σ = 1952940. Its totient is φ = 580608.

The previous prime is 1089029. The next prime is 1089047. The reversal of 1089045 is 5409801.

It can be written as a sum of positive squares in 2 ways, for example, as 178929 + 910116 = 423^2 + 954^2 .

It is not a de Polignac number, because 1089045 - 2⁴ = 1089029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089047) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 940 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (97647).

2^1089045 is an apocalyptic number.

1089045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1089045 is a deficient number, since it is larger than the sum of its proper divisors (863895).

1089045 is an equidigital number, since it uses as much as digits as its factorization.

1089045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706 (or 2697 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1089045 is about 1043.5731886169. The cubic root of 1089045 is about 102.8841818795.

The spelling of 1089045 in words is "one million, eighty-nine thousand, forty-five".