4144405 has 4 divisors (see below), whose sum is σ = 4973292. Its totient is φ = 3315520.

The previous prime is 4144373. The next prime is 4144409. The reversal of 4144405 is 5044414.

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 2090916 + 2053489 = 1446^2 + 1433^2 .

It is not a de Polignac number, because 4144405 - 2⁵ = 4144373 is a prime.

It is a Duffinian number.

4144405 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4144409) 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, 414436 + ... + 414445.

It is an arithmetic number, because the mean of its divisors is an integer number (1243323).

Almost surely, 2^4144405 is an apocalyptic number.

It is an amenable number.

4144405 is a deficient number, since it is larger than the sum of its proper divisors (828887).

4144405 is an equidigital number, since it uses as much as digits as its factorization.

4144405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828886.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 4144405 is about 2035.7811768459. The cubic root of 4144405 is about 160.6278068317.

Adding to 4144405 its reverse (5044414), we get a palindrome (9188819).

Subtracting 4144405 from its reverse (5044414), we obtain a palindrome (900009).

The spelling of 4144405 in words is "four million, one hundred forty-four thousand, four hundred five".