1156001065 has 8 divisors (see below), whose sum is σ = 1388168640. Its totient is φ = 924155952.

The previous prime is 1156001039. The next prime is 1156001083. The reversal of 1156001065 is 5601006511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156001065 is a prime.

It is a super-2 number, since 2×1156001065² = 2672676924562268450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72655 + ... + 87124.

It is an arithmetic number, because the mean of its divisors is an integer number (173521080).

Almost surely, 2^1156001065 is an apocalyptic number.

It is an amenable number.

1156001065 is a deficient number, since it is larger than the sum of its proper divisors (232167575).

1156001065 is a wasteful number, since it uses less digits than its factorization.

1156001065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161231.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1156001065 is about 34000.0156617611. The cubic root of 1156001065 is about 1049.5087845947.

Adding to 1156001065 its reverse (5601006511), we get a palindrome (6757007576).

The spelling of 1156001065 in words is "one billion, one hundred fifty-six million, one thousand, sixty-five".