115986021 has 8 divisors (see below), whose sum is σ = 154716864. Its totient is φ = 77289600.

The previous prime is 115986001. The next prime is 115986023. The reversal of 115986021 is 120689511.

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

It is not a de Polignac number, because 115986021 - 2¹⁰ = 115984997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115986023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696 + ... + 15246.

It is an arithmetic number, because the mean of its divisors is an integer number (19339608).

Almost surely, 2^115986021 is an apocalyptic number.

It is an amenable number.

115986021 is a deficient number, since it is larger than the sum of its proper divisors (38730843).

115986021 is a wasteful number, since it uses less digits than its factorization.

115986021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17211.

The product of its (nonzero) digits is 4320, while the sum is 33.

The square root of 115986021 is about 10769.6806359335. The cubic root of 115986021 is about 487.6803046397.

The spelling of 115986021 in words is "one hundred fifteen million, nine hundred eighty-six thousand, twenty-one".