115865437 has 4 divisors (see below), whose sum is σ = 115915680. Its totient is φ = 115815196.

The previous prime is 115865423. The next prime is 115865443. The reversal of 115865437 is 734568511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115865437 - 2¹¹ = 115863389 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115865437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115868437) 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, 21487 + ... + 26332.

It is an arithmetic number, because the mean of its divisors is an integer number (28978920).

Almost surely, 2^115865437 is an apocalyptic number.

It is an amenable number.

115865437 is a deficient number, since it is larger than the sum of its proper divisors (50243).

115865437 is an equidigital number, since it uses as much as digits as its factorization.

115865437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50242.

The product of its digits is 100800, while the sum is 40.

The square root of 115865437 is about 10764.0808711195. The cubic root of 115865437 is about 487.5112416430.

The spelling of 115865437 in words is "one hundred fifteen million, eight hundred sixty-five thousand, four hundred thirty-seven".