1156139065 has 8 divisors (see below), whose sum is σ = 1419631488. Its totient is φ = 903401520.

The previous prime is 1156139057. The next prime is 1156139071. The reversal of 1156139065 is 5609316511.

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

It is not a de Polignac number, because 1156139065 - 2³ = 1156139057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2688481 + ... + 2688910.

It is an arithmetic number, because the mean of its divisors is an integer number (177453936).

Almost surely, 2^1156139065 is an apocalyptic number.

It is an amenable number.

1156139065 is a deficient number, since it is larger than the sum of its proper divisors (263492423).

1156139065 is an equidigital number, since it uses as much as digits as its factorization.

1156139065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5377439.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 1156139065 is about 34002.0450120283. The cubic root of 1156139065 is about 1049.5505453548.

The spelling of 1156139065 in words is "one billion, one hundred fifty-six million, one hundred thirty-nine thousand, sixty-five".