442340121 has 16 divisors (see below), whose sum is σ = 624795200. Its totient is φ = 277587648.

The previous prime is 442340089. The next prime is 442340141. The reversal of 442340121 is 121043244.

It is not a de Polignac number, because 442340121 - 2⁵ = 442340089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442340141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15766 + ... + 33663.

It is an arithmetic number, because the mean of its divisors is an integer number (39049700).

Almost surely, 2^442340121 is an apocalyptic number.

It is an amenable number.

442340121 is a deficient number, since it is larger than the sum of its proper divisors (182455079).

442340121 is a wasteful number, since it uses less digits than its factorization.

442340121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49608.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 442340121 is about 21031.8834391977. The cubic root of 442340121 is about 761.9364979700.

Adding to 442340121 its reverse (121043244), we get a palindrome (563383365).

It can be divided in two parts, 4423 and 40121, that added together give a palindrome (44544).

The spelling of 442340121 in words is "four hundred forty-two million, three hundred forty thousand, one hundred twenty-one".