115742221 has 16 divisors (see below), whose sum is σ = 136805760. Its totient is φ = 95857920.

The previous prime is 115742213. The next prime is 115742261. The reversal of 115742221 is 122247511.

It is a cyclic number.

It is not a de Polignac number, because 115742221 - 2³ = 115742213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115742261) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 28825 + ... + 32593.

It is an arithmetic number, because the mean of its divisors is an integer number (8550360).

Almost surely, 2^115742221 is an apocalyptic number.

It is an amenable number.

115742221 is a deficient number, since it is larger than the sum of its proper divisors (21063539).

115742221 is a wasteful number, since it uses less digits than its factorization.

115742221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924.

The product of its digits is 1120, while the sum is 25.

The square root of 115742221 is about 10758.3558688119. The cubic root of 115742221 is about 487.3383672794.

Adding to 115742221 its reverse (122247511), we get a palindrome (237989732).

The spelling of 115742221 in words is "one hundred fifteen million, seven hundred forty-two thousand, two hundred twenty-one".