115145321 has 2 divisors, whose sum is σ = 115145322. Its totient is φ = 115145320.

The previous prime is 115145293. The next prime is 115145351. The reversal of 115145321 is 123541511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113656921 + 1488400 = 10661^2 + 1220^2 .

It is an emirp because it is prime and its reverse (123541511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115145321 - 2⁶ = 115145257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115145351) 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 as a sum of consecutive naturals, namely, 57572660 + 57572661.

It is an arithmetic number, because the mean of its divisors is an integer number (57572661).

Almost surely, 2^115145321 is an apocalyptic number.

It is an amenable number.

115145321 is a deficient number, since it is larger than the sum of its proper divisors (1).

115145321 is an equidigital number, since it uses as much as digits as its factorization.

115145321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 115145321 is about 10730.5787821534. The cubic root of 115145321 is about 486.4991639621.

Adding to 115145321 its reverse (123541511), we get a palindrome (238686832).

The spelling of 115145321 in words is "one hundred fifteen million, one hundred forty-five thousand, three hundred twenty-one".