115111001 has 4 divisors (see below), whose sum is σ = 115134900. Its totient is φ = 115087104.

The previous prime is 115110997. The next prime is 115111069. The reversal of 115111001 is 100111511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100111511 = 1709 ⋅58579.

It can be written as a sum of positive squares in 2 ways, for example, as 75672601 + 39438400 = 8699^2 + 6280^2 .

It is a cyclic number.

It is not a de Polignac number, because 115111001 - 2² = 115110997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115114001) 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, 1916 + ... + 15293.

It is an arithmetic number, because the mean of its divisors is an integer number (28783725).

Almost surely, 2^115111001 is an apocalyptic number.

It is an amenable number.

115111001 is a deficient number, since it is larger than the sum of its proper divisors (23899).

115111001 is an equidigital number, since it uses as much as digits as its factorization.

115111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23898.

The product of its (nonzero) digits is 5, while the sum is 11.

The square root of 115111001 is about 10728.9794948075. The cubic root of 115111001 is about 486.4508241474.

Adding to 115111001 its reverse (100111511), we get a palindrome (215222512).

It can be divided in two parts, 11511 and 1001, that multiplied together give a palindrome (11522511).

The spelling of 115111001 in words is "one hundred fifteen million, one hundred eleven thousand, one".