1172089 has 4 divisors (see below), whose sum is σ = 1178356. Its totient is φ = 1165824.

The previous prime is 1172081. The next prime is 1172107. The reversal of 1172089 is 9802711.

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 705600 + 466489 = 840^2 + 683^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172089 - 2³ = 1172081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172081) by changing a digit.

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, 2844 + ... + 3229.

It is an arithmetic number, because the mean of its divisors is an integer number (294589).

2^1172089 is an apocalyptic number.

It is an amenable number.

1172089 is a deficient number, since it is larger than the sum of its proper divisors (6267).

1172089 is an equidigital number, since it uses as much as digits as its factorization.

1172089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6266.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1172089 is about 1082.6305925846. The cubic root of 1172089 is about 105.4355003575.

The spelling of 1172089 in words is "one million, one hundred seventy-two thousand, eighty-nine".