4115521 has 4 divisors (see below), whose sum is σ = 4171972. Its totient is φ = 4059072.

The previous prime is 4115509. The next prime is 4115537. The reversal of 4115521 is 1255114.

4115521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 929296 + 3186225 = 964^2 + 1785^2 .

It is a cyclic number.

It is not a de Polignac number, because 4115521 - 2⁷ = 4115393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4115021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28116 + ... + 28261.

It is an arithmetic number, because the mean of its divisors is an integer number (1042993).

Almost surely, 2^4115521 is an apocalyptic number.

It is an amenable number.

4115521 is a deficient number, since it is larger than the sum of its proper divisors (56451).

4115521 is an equidigital number, since it uses as much as digits as its factorization.

4115521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56450.

The product of its digits is 200, while the sum is 19.

The square root of 4115521 is about 2028.6746905307. The cubic root of 4115521 is about 160.2537769575.

The spelling of 4115521 in words is "four million, one hundred fifteen thousand, five hundred twenty-one".