1115872965 has 24 divisors (see below), whose sum is σ = 1954127448. Its totient is φ = 588994560.

The previous prime is 1115872949. The next prime is 1115872981. The reversal of 1115872965 is 5692785111.

1115872965 is a `hidden beast` number, since 1 + 1 + 1 + 587 + 2 + 9 + 65 = 666.

It is an interprime number because it is at equal distance from previous prime (1115872949) and next prime (1115872981).

It can be written as a sum of positive squares in 4 ways, for example, as 11573604 + 1104299361 = 3402^2 + 33231^2 .

It is not a de Polignac number, because 1115872965 - 2⁴ = 1115872949 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1115872965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123456 + ... + 132185.

It is an arithmetic number, because the mean of its divisors is an integer number (81421977).

Almost surely, 2^1115872965 is an apocalyptic number.

1115872965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1115872965 is a deficient number, since it is larger than the sum of its proper divisors (838254483).

1115872965 is a wasteful number, since it uses less digits than its factorization.

1115872965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255749 (or 255746 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The square root of 1115872965 is about 33404.6847762406. The cubic root of 1115872965 is about 1037.2216786703.

The spelling of 1115872965 in words is "one billion, one hundred fifteen million, eight hundred seventy-two thousand, nine hundred sixty-five".