442420001 has 4 divisors (see below), whose sum is σ = 442479492. Its totient is φ = 442360512.

The previous prime is 442419983. The next prime is 442420009. The reversal of 442420001 is 100024244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 408080401 + 34339600 = 20201^2 + 5860^2 .

It is a cyclic number.

It is not a de Polignac number, because 442420001 - 2¹⁴ = 442403617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442420009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16676 + ... + 34101.

It is an arithmetic number, because the mean of its divisors is an integer number (110619873).

Almost surely, 2^442420001 is an apocalyptic number.

It is an amenable number.

442420001 is a deficient number, since it is larger than the sum of its proper divisors (59491).

442420001 is an equidigital number, since it uses as much as digits as its factorization.

442420001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59490.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 442420001 is about 21033.7823750271. The cubic root of 442420001 is about 761.9823599823.

Adding to 442420001 its reverse (100024244), we get a palindrome (542444245).

The spelling of 442420001 in words is "four hundred forty-two million, four hundred twenty thousand, one".