1152859009 has 4 divisors (see below), whose sum is σ = 1154803716. Its totient is φ = 1150914304.

The previous prime is 1152859003. The next prime is 1152859027. The reversal of 1152859009 is 9009582511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9009582511 = 29 ⋅310675259.

It can be written as a sum of positive squares in 2 ways, for example, as 734247409 + 418611600 = 27097^2 + 20460^2 .

It is a cyclic number.

It is not a de Polignac number, because 1152859009 - 2⁷ = 1152858881 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1152859003) 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, 971464 + ... + 972649.

It is an arithmetic number, because the mean of its divisors is an integer number (288700929).

Almost surely, 2^1152859009 is an apocalyptic number.

It is an amenable number.

1152859009 is a deficient number, since it is larger than the sum of its proper divisors (1944707).

1152859009 is an equidigital number, since it uses as much as digits as its factorization.

1152859009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944706.

The product of its (nonzero) digits is 32400, while the sum is 40.

The square root of 1152859009 is about 33953.7775365275. Note that the first 3 decimals coincide. The cubic root of 1152859009 is about 1048.5570531832.

The spelling of 1152859009 in words is "one billion, one hundred fifty-two million, eight hundred fifty-nine thousand, nine".