1152991575 has 18 divisors (see below), whose sum is σ = 2065136424. Its totient is φ = 614928720.

The previous prime is 1152991571. The next prime is 1152991577. The reversal of 1152991575 is 5751992511.

It is a happy number.

It is not a de Polignac number, because 1152991575 - 2² = 1152991571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1152991575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152991571) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2561979 + ... + 2562428.

Almost surely, 2^1152991575 is an apocalyptic number.

1152991575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1152991575 is a deficient number, since it is larger than the sum of its proper divisors (912144849).

1152991575 is a wasteful number, since it uses less digits than its factorization.

1152991575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124423 (or 5124415 counting only the distinct ones).

The product of its digits is 141750, while the sum is 45.

The square root of 1152991575 is about 33955.7296343342. The cubic root of 1152991575 is about 1048.5972424534.

The spelling of 1152991575 in words is "one billion, one hundred fifty-two million, nine hundred ninety-one thousand, five hundred seventy-five".