115640045 has 4 divisors (see below), whose sum is σ = 138768060. Its totient is φ = 92512032.

The previous prime is 115640039. The next prime is 115640047. The reversal of 115640045 is 540046511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540046511 = 2437 ⋅221603.

It can be written as a sum of positive squares in 2 ways, for example, as 67601284 + 48038761 = 8222^2 + 6931^2 .

It is a cyclic number.

It is not a de Polignac number, because 115640045 - 2⁶ = 115639981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 115639996 and 115640023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115640047) 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, 11564000 + ... + 11564009.

It is an arithmetic number, because the mean of its divisors is an integer number (34692015).

Almost surely, 2^115640045 is an apocalyptic number.

It is an amenable number.

115640045 is a deficient number, since it is larger than the sum of its proper divisors (23128015).

115640045 is an equidigital number, since it uses as much as digits as its factorization.

115640045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23128014.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 115640045 is about 10753.6061393376. The cubic root of 115640045 is about 487.1949193529.

Adding to 115640045 its reverse (540046511), we get a palindrome (655686556).

The spelling of 115640045 in words is "one hundred fifteen million, six hundred forty thousand, forty-five".