115042981 has 4 divisors (see below), whose sum is σ = 117490752. Its totient is φ = 112595212.

The previous prime is 115042969. The next prime is 115042997. The reversal of 115042981 is 189240511.

It is a happy number.

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 115042981 - 2⁹ = 115042469 is a prime.

It is a super-2 number, since 2×115042981² = 26469774954732722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115042381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223815 + ... + 1223908.

It is an arithmetic number, because the mean of its divisors is an integer number (29372688).

Almost surely, 2^115042981 is an apocalyptic number.

It is an amenable number.

115042981 is a deficient number, since it is larger than the sum of its proper divisors (2447771).

115042981 is an equidigital number, since it uses as much as digits as its factorization.

115042981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447770.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 115042981 is about 10725.8091070091. The cubic root of 115042981 is about 486.3549893899.

The spelling of 115042981 in words is "one hundred fifteen million, forty-two thousand, nine hundred eighty-one".