116521065 has 16 divisors (see below), whose sum is σ = 207148800. Its totient is φ = 62144496.

The previous prime is 116521063. The next prime is 116521087. The reversal of 116521065 is 560125611.

It is a happy number.

116521065 is a `hidden beast` number, since 1 + 1 + 652 + 1 + 0 + 6 + 5 = 666.

It is not a de Polignac number, because 116521065 - 2¹ = 116521063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (116521063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431425 + ... + 431694.

It is an arithmetic number, because the mean of its divisors is an integer number (12946800).

Almost surely, 2^116521065 is an apocalyptic number.

116521065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

116521065 is a deficient number, since it is larger than the sum of its proper divisors (90627735).

116521065 is an equidigital number, since it uses as much as digits as its factorization.

116521065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863133 (or 863127 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 116521065 is about 10794.4923456363. The cubic root of 116521065 is about 488.4290449316.

Adding to 116521065 its reverse (560125611), we get a palindrome (676646676).

The spelling of 116521065 in words is "one hundred sixteen million, five hundred twenty-one thousand, sixty-five".