442422401 has 2 divisors, whose sum is σ = 442422402. Its totient is φ = 442422400.

The previous prime is 442422377. The next prime is 442422419. The reversal of 442422401 is 104224244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434305600 + 8116801 = 20840^2 + 2849^2 .

It is a cyclic number.

It is not a de Polignac number, because 442422401 - 2²² = 438228097 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (442422451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221211200 + 221211201.

It is an arithmetic number, because the mean of its divisors is an integer number (221211201).

Almost surely, 2^442422401 is an apocalyptic number.

It is an amenable number.

442422401 is a deficient number, since it is larger than the sum of its proper divisors (1).

442422401 is an equidigital number, since it uses as much as digits as its factorization.

442422401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 442422401 is about 21033.8394260297. The cubic root of 442422401 is about 761.9837378241.

Adding to 442422401 its reverse (104224244), we get a palindrome (546646645).

The spelling of 442422401 in words is "four hundred forty-two million, four hundred twenty-two thousand, four hundred one".