442323025 has 6 divisors (see below), whose sum is σ = 548480582. Its totient is φ = 353858400.

The previous prime is 442322999. The next prime is 442323029. The reversal of 442323025 is 520323244.

442323025 = 14871² + 14872².

It can be written as a sum of positive squares in 3 ways, for example, as 102252544 + 340070481 = 10112^2 + 18441^2 .

It is not a de Polignac number, because 442323025 - 2¹³ = 442314833 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: 17692921 = 442323025 / (4 + 4 + 2 + 3 + 2 + 3 + 0 + 2 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442323029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8846436 + ... + 8846485.

Almost surely, 2^442323025 is an apocalyptic number.

442323025 is the 14872-nd centered square number.

It is an amenable number.

442323025 is a deficient number, since it is larger than the sum of its proper divisors (106157557).

442323025 is a wasteful number, since it uses less digits than its factorization.

442323025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17692931 (or 17692926 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 442323025 is about 21031.4770047184. The cubic root of 442323025 is about 761.9266818176.

Adding to 442323025 its reverse (520323244), we get a palindrome (962646269).

The spelling of 442323025 in words is "four hundred forty-two million, three hundred twenty-three thousand, twenty-five".