115145521 has 16 divisors (see below), whose sum is σ = 124571520. Its totient is φ = 106163200.

The previous prime is 115145519. The next prime is 115145549. The reversal of 115145521 is 125541511.

It is a cyclic number.

It is not a de Polignac number, because 115145521 - 2¹ = 115145519 is a prime.

It is a super-2 number, since 2×115145521² = 26516982012722882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115145321) 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 15 ways as a sum of consecutive naturals, for example, 71121 + ... + 72721.

It is an arithmetic number, because the mean of its divisors is an integer number (7785720).

Almost surely, 2^115145521 is an apocalyptic number.

It is an amenable number.

115145521 is a deficient number, since it is larger than the sum of its proper divisors (9425999).

115145521 is a wasteful number, since it uses less digits than its factorization.

115145521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736.

The product of its digits is 1000, while the sum is 25.

The square root of 115145521 is about 10730.5881013111. The cubic root of 115145521 is about 486.4994456345.

The spelling of 115145521 in words is "one hundred fifteen million, one hundred forty-five thousand, five hundred twenty-one".