115542439 has 4 divisors (see below), whose sum is σ = 121623640. Its totient is φ = 109461240.

The previous prime is 115542437. The next prime is 115542451. The reversal of 115542439 is 934245511.

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

It is a cyclic number.

It is not a de Polignac number, because 115542439 - 2¹ = 115542437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115542431) 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, 3040572 + ... + 3040609.

It is an arithmetic number, because the mean of its divisors is an integer number (30405910).

Almost surely, 2^115542439 is an apocalyptic number.

115542439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

115542439 is a deficient number, since it is larger than the sum of its proper divisors (6081201).

115542439 is an equidigital number, since it uses as much as digits as its factorization.

115542439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6081200.

The product of its digits is 21600, while the sum is 34.

The square root of 115542439 is about 10749.0668897351. The cubic root of 115542439 is about 487.0578084508.

The spelling of 115542439 in words is "one hundred fifteen million, five hundred forty-two thousand, four hundred thirty-nine".