115540405 has 8 divisors (see below), whose sum is σ = 140921784. Its totient is φ = 90916800.

The previous prime is 115540393. The next prime is 115540427. The reversal of 115540405 is 504045511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 579121 + 114961284 = 761^2 + 10722^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115540405 - 2²⁵ = 81985973 is a prime.

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 115540405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189106 + ... + 189715.

It is an arithmetic number, because the mean of its divisors is an integer number (17615223).

Almost surely, 2^115540405 is an apocalyptic number.

It is an amenable number.

115540405 is a deficient number, since it is larger than the sum of its proper divisors (25381379).

115540405 is an equidigital number, since it uses as much as digits as its factorization.

115540405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378887.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 115540405 is about 10748.9722764551. The cubic root of 115540405 is about 487.0549503916.

Adding to 115540405 its reverse (504045511), we get a palindrome (619585916).

The spelling of 115540405 in words is "one hundred fifteen million, five hundred forty thousand, four hundred five".