4423145 has 12 divisors (see below), whose sum is σ = 5640204. Its totient is φ = 3329280.

The previous prime is 4423127. The next prime is 4423157. The reversal of 4423145 is 5413244.

It can be written as a sum of positive squares in 6 ways, for example, as 1048576 + 3374569 = 1024^2 + 1837^2 .

It is not a de Polignac number, because 4423145 - 2¹⁶ = 4357609 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4423145.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86 + ... + 2975.

It is an arithmetic number, because the mean of its divisors is an integer number (470017).

Almost surely, 2^4423145 is an apocalyptic number.

It is an amenable number.

4423145 is a deficient number, since it is larger than the sum of its proper divisors (1217059).

4423145 is a wasteful number, since it uses less digits than its factorization.

4423145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100 (or 3083 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 4423145 is about 2103.1274331338. The cubic root of 4423145 is about 164.1510728687.

Adding to 4423145 its reverse (5413244), we get a palindrome (9836389).

Subtracting 4423145 from its reverse (5413244), we obtain a palindrome (990099).

The spelling of 4423145 in words is "four million, four hundred twenty-three thousand, one hundred forty-five".