115129591 has 8 divisors (see below), whose sum is σ = 118293840. Its totient is φ = 112005888.

The previous prime is 115129561. The next prime is 115129601. The reversal of 115129591 is 195921511.

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

It is a cyclic number.

It is not a de Polignac number, because 115129591 - 2⁷ = 115129463 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 (115129561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4336 + ... + 15781.

It is an arithmetic number, because the mean of its divisors is an integer number (14786730).

Almost surely, 2^115129591 is an apocalyptic number.

115129591 is a deficient number, since it is larger than the sum of its proper divisors (3164249).

115129591 is an equidigital number, since it uses as much as digits as its factorization.

115129591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20273.

The product of its digits is 4050, while the sum is 34.

The square root of 115129591 is about 10729.8458050431. The cubic root of 115129591 is about 486.4770094062.

The spelling of 115129591 in words is "one hundred fifteen million, one hundred twenty-nine thousand, five hundred ninety-one".