442744425 has 18 divisors (see below), whose sum is σ = 793004862. Its totient is φ = 236130240.

The previous prime is 442744417. The next prime is 442744429. The reversal of 442744425 is 524447244.

It can be written as a sum of positive squares in 3 ways, for example, as 101123136 + 341621289 = 10056^2 + 18483^2 .

It is not a de Polignac number, because 442744425 - 2³ = 442744417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442744425.

It is not an unprimeable number, because it can be changed into a prime (442744429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 983652 + ... + 984101.

Almost surely, 2^442744425 is an apocalyptic number.

442744425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

442744425 is a deficient number, since it is larger than the sum of its proper divisors (350260437).

442744425 is a wasteful number, since it uses less digits than its factorization.

442744425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967769 (or 1967761 counting only the distinct ones).

The product of its digits is 143360, while the sum is 36.

The square root of 442744425 is about 21041.4929365765. The cubic root of 442744425 is about 762.1685668780.

The spelling of 442744425 in words is "four hundred forty-two million, seven hundred forty-four thousand, four hundred twenty-five".