442121201 has 8 divisors (see below), whose sum is σ = 449453664. Its totient is φ = 434848960.

The previous prime is 442121191. The next prime is 442121213. The reversal of 442121201 is 102121244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442121201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442121201.

It is not an unprimeable number, because it can be changed into a prime (442121221) 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 7 ways as a sum of consecutive naturals, for example, 131 + ... + 29736.

It is an arithmetic number, because the mean of its divisors is an integer number (56181708).

Almost surely, 2^442121201 is an apocalyptic number.

It is an amenable number.

442121201 is a deficient number, since it is larger than the sum of its proper divisors (7332463).

442121201 is a wasteful number, since it uses less digits than its factorization.

442121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30111.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 442121201 is about 21026.6783158919. The cubic root of 442121201 is about 761.8107797309.

Adding to 442121201 its reverse (102121244), we get a palindrome (544242445).

The spelling of 442121201 in words is "four hundred forty-two million, one hundred twenty-one thousand, two hundred one".