4421545 has 4 divisors (see below), whose sum is σ = 5305860. Its totient is φ = 3537232.

The previous prime is 4421539. The next prime is 4421567. The reversal of 4421545 is 5451244.

It is a happy number.

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 2752281 + 1669264 = 1659^2 + 1292^2 .

It is a cyclic number.

It is not a de Polignac number, because 4421545 - 2⁹ = 4421033 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442150 + ... + 442159.

It is an arithmetic number, because the mean of its divisors is an integer number (1326465).

Almost surely, 2^4421545 is an apocalyptic number.

It is an amenable number.

4421545 is a deficient number, since it is larger than the sum of its proper divisors (884315).

4421545 is an equidigital number, since it uses as much as digits as its factorization.

4421545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884314.

The product of its digits is 3200, while the sum is 25.

The square root of 4421545 is about 2102.7470128382. The cubic root of 4421545 is about 164.1312774975.

Adding to 4421545 its reverse (5451244), we get a palindrome (9872789).

The spelling of 4421545 in words is "four million, four hundred twenty-one thousand, five hundred forty-five".