1089645 has 8 divisors (see below), whose sum is σ = 1743456. Its totient is φ = 581136.

The previous prime is 1089629. The next prime is 1089653. The reversal of 1089645 is 5469801.

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

It is not a de Polignac number, because 1089645 - 2⁴ = 1089629 is a prime.

It is a super-3 number, since 3×1089645³ = 3881292256671033375, which contains 333 as substring.

It is a Curzon number.

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, 36307 + ... + 36336.

It is an arithmetic number, because the mean of its divisors is an integer number (217932).

2^1089645 is an apocalyptic number.

1089645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1089645 is a deficient number, since it is larger than the sum of its proper divisors (653811).

1089645 is an equidigital number, since it uses as much as digits as its factorization.

1089645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72651.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1089645 is about 1043.8606228803. The cubic root of 1089645 is about 102.9030727964.

The spelling of 1089645 in words is "one million, eighty-nine thousand, six hundred forty-five".