115881001 has 4 divisors (see below), whose sum is σ = 118575952. Its totient is φ = 113186052.

The previous prime is 115880987. The next prime is 115881049. The reversal of 115881001 is 100188511.

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 115881001 - 2⁹ = 115880489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115882001) 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, 1347411 + ... + 1347496.

It is an arithmetic number, because the mean of its divisors is an integer number (29643988).

Almost surely, 2^115881001 is an apocalyptic number.

It is an amenable number.

115881001 is a deficient number, since it is larger than the sum of its proper divisors (2694951).

115881001 is an equidigital number, since it uses as much as digits as its factorization.

115881001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694950.

The product of its (nonzero) digits is 320, while the sum is 25.

The square root of 115881001 is about 10764.8038068513. The cubic root of 115881001 is about 487.5330695077.

The spelling of 115881001 in words is "one hundred fifteen million, eight hundred eighty-one thousand, one".