42204424 has 8 divisors (see below), whose sum is σ = 79133310. Its totient is φ = 21102208.

The previous prime is 42204419. The next prime is 42204427. The reversal of 42204424 is 42440224.

It can be written as a sum of positive squares in only one way, i.e., 27227524 + 14976900 = 5218^2 + 3870^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 42204395 and 42204404.

It is not an unprimeable number, because it can be changed into a prime (42204427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2637769 + ... + 2637784.

Almost surely, 2^42204424 is an apocalyptic number.

It is an amenable number.

42204424 is a deficient number, since it is larger than the sum of its proper divisors (36928886).

42204424 is a wasteful number, since it uses less digits than its factorization.

42204424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275559 (or 5275555 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 42204424 is about 6496.4932078776. The cubic root of 42204424 is about 348.1657069639.

Adding to 42204424 its reverse (42440224), we get a palindrome (84644648).

The spelling of 42204424 in words is "forty-two million, two hundred four thousand, four hundred twenty-four".