1158115975 has 12 divisors (see below), whose sum is σ = 1442341960. Its totient is φ = 922442400.

The previous prime is 1158115961. The next prime is 1158115991. The reversal of 1158115975 is 5795118511.

It is not a de Polignac number, because 1158115975 - 2¹⁵ = 1158083207 is a prime.

It is a super-2 number, since 2×1158115975² = 2682465223100401250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95421 + ... + 106870.

Almost surely, 2^1158115975 is an apocalyptic number.

1158115975 is a deficient number, since it is larger than the sum of its proper divisors (284225985).

1158115975 is a wasteful number, since it uses less digits than its factorization.

1158115975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202530 (or 202525 counting only the distinct ones).

The product of its digits is 63000, while the sum is 43.

The square root of 1158115975 is about 34031.1030529426. The cubic root of 1158115975 is about 1050.1484219517.

It can be divided in two parts, 11581 and 15975, that added together give a square (27556 = 166²).

The spelling of 1158115975 in words is "one billion, one hundred fifty-eight million, one hundred fifteen thousand, nine hundred seventy-five".