42445224 has 48 divisors (see below), whose sum is σ = 115626420. Its totient is φ = 14065920.

The previous prime is 42445223. The next prime is 42445279. The reversal of 42445224 is 42254424.

It is a Cunningham number, because it is equal to 6515²-1.

It can be written as a sum of positive squares in 2 ways, for example, as 41602500 + 842724 = 6450^2 + 918^2 .

It is not an unprimeable number, because it can be changed into a prime (42445223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11404 + ... + 14660.

Almost surely, 2^42445224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42445224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57813210).

42445224 is an abundant number, since it is smaller than the sum of its proper divisors (73181196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42445224 is a wasteful number, since it uses less digits than its factorization.

42445224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450 (or 3443 counting only the distinct ones).

The product of its digits is 10240, while the sum is 27.

The square root of 42445224 is about 6514.9999232540. Note that the first 4 decimals coincide. The cubic root of 42445224 is about 348.8266120663.

Adding to 42445224 its reverse (42254424), we get a palindrome (84699648).

The spelling of 42445224 in words is "forty-two million, four hundred forty-five thousand, two hundred twenty-four".