1165001509 has 12 divisors (see below), whose sum is σ = 1355790144. Its totient is φ = 998142264.

The previous prime is 1165001503. The next prime is 1165001527. The reversal of 1165001509 is 9051005611.

It is not a de Polignac number, because 1165001509 - 2³ = 1165001501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165001501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170452 + ... + 177154.

It is an arithmetic number, because the mean of its divisors is an integer number (112982512).

Almost surely, 2^1165001509 is an apocalyptic number.

It is an amenable number.

1165001509 is a deficient number, since it is larger than the sum of its proper divisors (190788635).

1165001509 is an equidigital number, since it uses as much as digits as its factorization.

1165001509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10264 (or 10257 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 1165001509 is about 34132.1184370382. The cubic root of 1165001509 is about 1052.2255166336.

The spelling of 1165001509 in words is "one billion, one hundred sixty-five million, one thousand, five hundred nine".