442321001 has 4 divisors (see below), whose sum is σ = 442449732. Its totient is φ = 442192272.

The previous prime is 442320973. The next prime is 442321003. The reversal of 442321001 is 100123244.

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 226201600 + 216119401 = 15040^2 + 14701^2 .

It is a cyclic number.

It is not a de Polignac number, because 442321001 - 2⁶ = 442320937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442321003) 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, 59066 + ... + 66131.

It is an arithmetic number, because the mean of its divisors is an integer number (110612433).

Almost surely, 2^442321001 is an apocalyptic number.

It is an amenable number.

442321001 is a deficient number, since it is larger than the sum of its proper divisors (128731).

442321001 is a wasteful number, since it uses less digits than its factorization.

442321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128730.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 442321001 is about 21031.4288863120. The cubic root of 442321001 is about 761.9255196639.

Adding to 442321001 its reverse (100123244), we get a palindrome (542444245).

The spelling of 442321001 in words is "four hundred forty-two million, three hundred twenty-one thousand, one".