1152209 has 4 divisors (see below), whose sum is σ = 1220004. Its totient is φ = 1084416.

The previous prime is 1152187. The next prime is 1152227. The reversal of 1152209 is 9022511.

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 846400 + 305809 = 920^2 + 553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1152209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1152509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33872 + ... + 33905.

It is an arithmetic number, because the mean of its divisors is an integer number (305001).

2^1152209 is an apocalyptic number.

It is an amenable number.

1152209 is a deficient number, since it is larger than the sum of its proper divisors (67795).

1152209 is an equidigital number, since it uses as much as digits as its factorization.

1152209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67794.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1152209 is about 1073.4099869109. The cubic root of 1152209 is about 104.8359949099.

The spelling of 1152209 in words is "one million, one hundred fifty-two thousand, two hundred nine".