1158245775 has 36 divisors (see below), whose sum is σ = 2082913560. Its totient is φ = 615240000.

The previous prime is 1158245771. The next prime is 1158245779. The reversal of 1158245775 is 5775428511.

1158245775 is a `hidden beast` number, since 1 + 1 + 58 + 24 + 577 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1158245771) and next prime (1158245779).

It is not a de Polignac number, because 1158245775 - 2² = 1158245771 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 1158245775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158245771) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 46221 + ... + 66729.

It is an arithmetic number, because the mean of its divisors is an integer number (57858710).

Almost surely, 2^1158245775 is an apocalyptic number.

1158245775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1158245775 is a deficient number, since it is larger than the sum of its proper divisors (924667785).

1158245775 is a wasteful number, since it uses less digits than its factorization.

1158245775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20776 (or 20768 counting only the distinct ones).

The product of its digits is 392000, while the sum is 45.

The square root of 1158245775 is about 34033.0100784518. The cubic root of 1158245775 is about 1050.1876535358.

It can be divided in two parts, 115824 and 5775, that multiplied together give a triangular number (668883600 = T₃₆₅₇₅).

The spelling of 1158245775 in words is "one billion, one hundred fifty-eight million, two hundred forty-five thousand, seven hundred seventy-five".