116865521 has 4 divisors (see below), whose sum is σ = 117718692. Its totient is φ = 116012352.

The previous prime is 116865517. The next prime is 116865533. The reversal of 116865521 is 125568611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41783296 + 75082225 = 6464^2 + 8665^2 .

It is a cyclic number.

It is not a de Polignac number, because 116865521 - 2² = 116865517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116865571) 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, 426380 + ... + 426653.

It is an arithmetic number, because the mean of its divisors is an integer number (29429673).

Almost surely, 2^116865521 is an apocalyptic number.

It is an amenable number.

116865521 is a deficient number, since it is larger than the sum of its proper divisors (853171).

116865521 is an equidigital number, since it uses as much as digits as its factorization.

116865521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853170.

The product of its digits is 14400, while the sum is 35.

The square root of 116865521 is about 10810.4357451492. The cubic root of 116865521 is about 488.9098644371.

The spelling of 116865521 in words is "one hundred sixteen million, eight hundred sixty-five thousand, five hundred twenty-one".