1152272809 has 2 divisors, whose sum is σ = 1152272810. Its totient is φ = 1152272808.

The previous prime is 1152272789. The next prime is 1152272813. The reversal of 1152272809 is 9082722511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999824400 + 152448409 = 31620^2 + 12347^2 .

It is a cyclic number.

It is not a de Polignac number, because 1152272809 - 2⁵ = 1152272777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1152272839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576136404 + 576136405.

It is an arithmetic number, because the mean of its divisors is an integer number (576136405).

Almost surely, 2^1152272809 is an apocalyptic number.

It is an amenable number.

1152272809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1152272809 is an equidigital number, since it uses as much as digits as its factorization.

1152272809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1152272809 is about 33945.1441151750. The cubic root of 1152272809 is about 1048.3793013651.

The spelling of 1152272809 in words is "one billion, one hundred fifty-two million, two hundred seventy-two thousand, eight hundred nine".