42444245 has 4 divisors (see below), whose sum is σ = 50933100. Its totient is φ = 33955392.

The previous prime is 42444221. The next prime is 42444247. The reversal of 42444245 is 54244424.

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 17783089 + 24661156 = 4217^2 + 4966^2 .

It is a cyclic number.

It is not a de Polignac number, because 42444245 - 2¹² = 42440149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42444247) 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, 4244420 + ... + 4244429.

It is an arithmetic number, because the mean of its divisors is an integer number (12733275).

Almost surely, 2^42444245 is an apocalyptic number.

It is an amenable number.

42444245 is a deficient number, since it is larger than the sum of its proper divisors (8488855).

42444245 is an equidigital number, since it uses as much as digits as its factorization.

42444245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8488854.

The product of its digits is 20480, while the sum is 29.

The square root of 42444245 is about 6514.9247885144. The cubic root of 42444245 is about 348.8239301479.

Adding to 42444245 its reverse (54244424), we get a palindrome (96688669).

The spelling of 42444245 in words is "forty-two million, four hundred forty-four thousand, two hundred forty-five".