4223545 has 4 divisors (see below), whose sum is σ = 5068260. Its totient is φ = 3378832.

The previous prime is 4223543. The next prime is 4223551. The reversal of 4223545 is 5453224.

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 1192464 + 3031081 = 1092^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 4223545 - 2¹ = 4223543 is a prime.

4223545 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4223543) 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, 422350 + ... + 422359.

It is an arithmetic number, because the mean of its divisors is an integer number (1267065).

Almost surely, 2^4223545 is an apocalyptic number.

It is an amenable number.

4223545 is a deficient number, since it is larger than the sum of its proper divisors (844715).

4223545 is an equidigital number, since it uses as much as digits as its factorization.

4223545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844714.

The product of its digits is 4800, while the sum is 25.

The square root of 4223545 is about 2055.1265167867. The cubic root of 4223545 is about 161.6437964365.

Adding to 4223545 its reverse (5453224), we get a palindrome (9676769).

The spelling of 4223545 in words is "four million, two hundred twenty-three thousand, five hundred forty-five".