4080521 has 4 divisors (see below), whose sum is σ = 4087044. Its totient is φ = 4074000.

The previous prime is 4080511. The next prime is 4080533. The reversal of 4080521 is 1250804.

4080521 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 3534400 + 546121 = 1880^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 4080521 - 2⁶ = 4080457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4080493 and 4080502.

It is not an unprimeable number, because it can be changed into a prime (4080511) 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, 2210 + ... + 3611.

It is an arithmetic number, because the mean of its divisors is an integer number (1021761).

Almost surely, 2^4080521 is an apocalyptic number.

It is an amenable number.

4080521 is a deficient number, since it is larger than the sum of its proper divisors (6523).

4080521 is an equidigital number, since it uses as much as digits as its factorization.

4080521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6522.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 4080521 is about 2020.0299502730. The cubic root of 4080521 is about 159.7981960978.

The spelling of 4080521 in words is "four million, eighty thousand, five hundred twenty-one".