115845161 has 4 divisors (see below), whose sum is σ = 117744324. Its totient is φ = 113946000.

The previous prime is 115845133. The next prime is 115845167. The reversal of 115845161 is 161548511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161548511 = 3823 ⋅42257.

It can be written as a sum of positive squares in 2 ways, for example, as 55875625 + 59969536 = 7475^2 + 7744^2 .

It is a cyclic number.

It is not a de Polignac number, because 115845161 - 2⁶ = 115845097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115845167) 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, 949490 + ... + 949611.

It is an arithmetic number, because the mean of its divisors is an integer number (29436081).

Almost surely, 2^115845161 is an apocalyptic number.

It is an amenable number.

115845161 is a deficient number, since it is larger than the sum of its proper divisors (1899163).

115845161 is an equidigital number, since it uses as much as digits as its factorization.

115845161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899162.

The product of its digits is 4800, while the sum is 32.

The square root of 115845161 is about 10763.1389938066. The cubic root of 115845161 is about 487.4828024615.

The spelling of 115845161 in words is "one hundred fifteen million, eight hundred forty-five thousand, one hundred sixty-one".