115120015145 has 4 divisors (see below), whose sum is σ = 138144018180. Its totient is φ = 92096012112.

The previous prime is 115120015139. The next prime is 115120015147. The reversal of 115120015145 is 541510021511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91668461824 + 23451553321 = 302768^2 + 153139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115120015145 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115120015147) by changing a digit.

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, 11512001510 + ... + 11512001519.

It is an arithmetic number, because the mean of its divisors is an integer number (34536004545).

Almost surely, 2^115120015145 is an apocalyptic number.

It is an amenable number.

115120015145 is a deficient number, since it is larger than the sum of its proper divisors (23024003035).

115120015145 is an equidigital number, since it uses as much as digits as its factorization.

115120015145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23024003034.

The product of its (nonzero) digits is 1000, while the sum is 26.

Adding to 115120015145 its reverse (541510021511), we get a palindrome (656630036656).

The spelling of 115120015145 in words is "one hundred fifteen billion, one hundred twenty million, fifteen thousand, one hundred forty-five".