4420645 has 4 divisors (see below), whose sum is σ = 5304780. Its totient is φ = 3536512.

The previous prime is 4420639. The next prime is 4420667. The reversal of 4420645 is 5460244.

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 3448449 + 972196 = 1857^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 4420645 - 2⁵ = 4420613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442060 + ... + 442069.

It is an arithmetic number, because the mean of its divisors is an integer number (1326195).

Almost surely, 2^4420645 is an apocalyptic number.

It is an amenable number.

4420645 is a deficient number, since it is larger than the sum of its proper divisors (884135).

4420645 is an equidigital number, since it uses as much as digits as its factorization.

4420645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884134.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 4420645 is about 2102.5329961739. The cubic root of 4420645 is about 164.1201405025.

Adding to 4420645 its reverse (5460244), we get a palindrome (9880889).

The spelling of 4420645 in words is "four million, four hundred twenty thousand, six hundred forty-five".