442512625 has 8 divisors (see below), whose sum is σ = 552255912. Its totient is φ = 354010000.

The previous prime is 442512619. The next prime is 442512647. The reversal of 442512625 is 526215244.

It can be written as a sum of positive squares in 4 ways, for example, as 105863521 + 336649104 = 10289^2 + 18348^2 .

It is not a de Polignac number, because 442512625 - 2²¹ = 440415473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1769926 + ... + 1770175.

It is an arithmetic number, because the mean of its divisors is an integer number (69031989).

Almost surely, 2^442512625 is an apocalyptic number.

It is an amenable number.

442512625 is a deficient number, since it is larger than the sum of its proper divisors (109743287).

442512625 is an equidigital number, since it uses as much as digits as its factorization.

442512625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540116 (or 3540106 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 442512625 is about 21035.9840511444. The cubic root of 442512625 is about 762.0355318772.

Adding to 442512625 its reverse (526215244), we get a palindrome (968727869).

The spelling of 442512625 in words is "four hundred forty-two million, five hundred twelve thousand, six hundred twenty-five".