4383521 has 4 divisors (see below), whose sum is σ = 4455444. Its totient is φ = 4311600.

The previous prime is 4383503. The next prime is 4383529. The reversal of 4383521 is 1253834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1253834 = 2 ⋅626917.

It can be written as a sum of positive squares in 2 ways, for example, as 57121 + 4326400 = 239^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 4383521 - 2¹⁴ = 4367137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4383529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35870 + ... + 35991.

It is an arithmetic number, because the mean of its divisors is an integer number (1113861).

Almost surely, 2^4383521 is an apocalyptic number.

It is an amenable number.

4383521 is a deficient number, since it is larger than the sum of its proper divisors (71923).

4383521 is an equidigital number, since it uses as much as digits as its factorization.

4383521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71922.

The product of its digits is 2880, while the sum is 26.

The square root of 4383521 is about 2093.6859840960. The cubic root of 4383521 is about 163.6594285763.

The spelling of 4383521 in words is "four million, three hundred eighty-three thousand, five hundred twenty-one".