115724121 has 4 divisors (see below), whose sum is σ = 154298832. Its totient is φ = 77149412.

The previous prime is 115724111. The next prime is 115724129. The reversal of 115724121 is 121427511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115724121 - 2⁶ = 115724057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 115724091 and 115724100.

It is not an unprimeable number, because it can be changed into a prime (115724129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19287351 + ... + 19287356.

It is an arithmetic number, because the mean of its divisors is an integer number (38574708).

Almost surely, 2^115724121 is an apocalyptic number.

It is an amenable number.

115724121 is a deficient number, since it is larger than the sum of its proper divisors (38574711).

115724121 is an equidigital number, since it uses as much as digits as its factorization.

115724121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38574710.

The product of its digits is 560, while the sum is 24.

The square root of 115724121 is about 10757.5146293184. The cubic root of 115724121 is about 487.3129623055.

The spelling of 115724121 in words is "one hundred fifteen million, seven hundred twenty-four thousand, one hundred twenty-one".