115321145 has 4 divisors (see below), whose sum is σ = 138385380. Its totient is φ = 92256912.

The previous prime is 115321109. The next prime is 115321153. The reversal of 115321145 is 541123511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541123511 = 5333 ⋅101467.

It can be written as a sum of positive squares in 2 ways, for example, as 35808256 + 79512889 = 5984^2 + 8917^2 .

It is a cyclic number.

It is not a de Polignac number, because 115321145 - 2⁸ = 115320889 is a prime.

It is a super-2 number, since 2×115321145² = 26597932968222050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 115321145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11532110 + ... + 11532119.

It is an arithmetic number, because the mean of its divisors is an integer number (34596345).

Almost surely, 2^115321145 is an apocalyptic number.

It is an amenable number.

115321145 is a deficient number, since it is larger than the sum of its proper divisors (23064235).

115321145 is an equidigital number, since it uses as much as digits as its factorization.

115321145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23064234.

The product of its digits is 600, while the sum is 23.

The square root of 115321145 is about 10738.7683185736. The cubic root of 115321145 is about 486.7466620133.

Adding to 115321145 its reverse (541123511), we get a palindrome (656444656).

The spelling of 115321145 in words is "one hundred fifteen million, three hundred twenty-one thousand, one hundred forty-five".