1158975085 has 16 divisors (see below), whose sum is σ = 1508501232. Its totient is φ = 851353600.

The previous prime is 1158975079. The next prime is 1158975089. The reversal of 1158975085 is 5805798511.

It can be written as a sum of positive squares in 8 ways, for example, as 14235529 + 1144739556 = 3773^2 + 33834^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1158975085 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 (1158975089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162796 + ... + 169765.

It is an arithmetic number, because the mean of its divisors is an integer number (94281327).

Almost surely, 2^1158975085 is an apocalyptic number.

It is an amenable number.

1158975085 is a deficient number, since it is larger than the sum of its proper divisors (349526147).

1158975085 is a wasteful number, since it uses less digits than its factorization.

1158975085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332624.

The product of its (nonzero) digits is 504000, while the sum is 49.

The square root of 1158975085 is about 34043.7231365783. The cubic root of 1158975085 is about 1050.4080303832.

The spelling of 1158975085 in words is "one billion, one hundred fifty-eight million, nine hundred seventy-five thousand, eighty-five".