115806121 has 16 divisors (see below), whose sum is σ = 124863040. Its totient is φ = 107075520.

The previous prime is 115806109. The next prime is 115806133. The reversal of 115806121 is 121608511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (115806109) and next prime (115806133).

It is a cyclic number.

It is not a de Polignac number, because 115806121 - 2⁹ = 115805609 is a prime.

It is a super-2 number, since 2×115806121² = 26822115322133282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115806151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188611 + ... + 189223.

It is an arithmetic number, because the mean of its divisors is an integer number (7803940).

Almost surely, 2^115806121 is an apocalyptic number.

It is an amenable number.

115806121 is a deficient number, since it is larger than the sum of its proper divisors (9056919).

115806121 is a wasteful number, since it uses less digits than its factorization.

115806121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 115806121 is about 10761.3252436677. The cubic root of 115806121 is about 487.4280354872.

The spelling of 115806121 in words is "one hundred fifteen million, eight hundred six thousand, one hundred twenty-one".