4421609 has 4 divisors (see below), whose sum is σ = 4471380. Its totient is φ = 4371840.

The previous prime is 4421603. The next prime is 4421617. The reversal of 4421609 is 9061244.

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 2111209 + 2310400 = 1453^2 + 1520^2 .

It is a cyclic number.

It is not a de Polignac number, because 4421609 - 2⁸ = 4421353 is a prime.

It is a super-2 number, since 2×4421609² = 39101252297762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4421603) 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, 24752 + ... + 24929.

It is an arithmetic number, because the mean of its divisors is an integer number (1117845).

Almost surely, 2^4421609 is an apocalyptic number.

It is an amenable number.

4421609 is a deficient number, since it is larger than the sum of its proper divisors (49771).

4421609 is an equidigital number, since it uses as much as digits as its factorization.

4421609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49770.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 4421609 is about 2102.7622309714. The cubic root of 4421609 is about 164.1320694040.

The spelling of 4421609 in words is "four million, four hundred twenty-one thousand, six hundred nine".