115642811 has 4 divisors (see below), whose sum is σ = 115664472. Its totient is φ = 115621152.

The previous prime is 115642777. The next prime is 115642819. The reversal of 115642811 is 118246511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118246511 = 8123 ⋅14557.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115642811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115642819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3491 + ... + 15603.

It is an arithmetic number, because the mean of its divisors is an integer number (28916118).

Almost surely, 2^115642811 is an apocalyptic number.

115642811 is a deficient number, since it is larger than the sum of its proper divisors (21661).

115642811 is an equidigital number, since it uses as much as digits as its factorization.

115642811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21660.

The product of its digits is 1920, while the sum is 29.

The square root of 115642811 is about 10753.7347465892. The cubic root of 115642811 is about 487.1988037351.

The spelling of 115642811 in words is "one hundred fifteen million, six hundred forty-two thousand, eight hundred eleven".