1115491599 has 12 divisors (see below), whose sum is σ = 1615887000. Its totient is φ = 741528144.

The previous prime is 1115491589. The next prime is 1115491603. The reversal of 1115491599 is 9951945111.

It is a happy number.

1115491599 is a `hidden beast` number, since 1 + 1 + 1 + 54 + 9 + 1 + 599 = 666.

It is not a de Polignac number, because 1115491599 - 2⁷ = 1115491471 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115491529) 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, 174429 + ... + 180710.

It is an arithmetic number, because the mean of its divisors is an integer number (134657250).

Almost surely, 2^1115491599 is an apocalyptic number.

1115491599 is a deficient number, since it is larger than the sum of its proper divisors (500395401).

1115491599 is a wasteful number, since it uses less digits than its factorization.

1115491599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355494 (or 355491 counting only the distinct ones).

The product of its digits is 72900, while the sum is 45.

The square root of 1115491599 is about 33398.9760172374. The cubic root of 1115491599 is about 1037.1035032846.

The spelling of 1115491599 in words is "one billion, one hundred fifteen million, four hundred ninety-one thousand, five hundred ninety-nine".