442004425 has 6 divisors (see below), whose sum is σ = 548085518. Its totient is φ = 353603520.

The previous prime is 442004419. The next prime is 442004461. The reversal of 442004425 is 524400244.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 150994944 + 291009481 = 12288^2 + 17059^2 .

It is not a de Polignac number, because 442004425 - 2⁵ = 442004393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 17680177 = 442004425 / (4 + 4 + 2 + 0 + 0 + 4 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442004425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8840064 + ... + 8840113.

Almost surely, 2^442004425 is an apocalyptic number.

It is an amenable number.

442004425 is a deficient number, since it is larger than the sum of its proper divisors (106081093).

442004425 is a wasteful number, since it uses less digits than its factorization.

442004425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17680187 (or 17680182 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 442004425 is about 21023.9012792583. The cubic root of 442004425 is about 761.7437023104.

Adding to 442004425 its reverse (524400244), we get a palindrome (966404669).

The spelling of 442004425 in words is "four hundred forty-two million, four thousand, four hundred twenty-five".