442405100421 has 12 divisors (see below), whose sum is σ = 639302826240. Its totient is φ = 294810624360.

The previous prime is 442405100399. The next prime is 442405100437. The reversal of 442405100421 is 124001504244.

It is not a de Polignac number, because 442405100421 - 2³⁴ = 425225231237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442405100471) 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 11 ways as a sum of consecutive naturals, for example, 10486885 + ... + 10528986.

It is an arithmetic number, because the mean of its divisors is an integer number (53275235520).

Almost surely, 2^442405100421 is an apocalyptic number.

It is an amenable number.

442405100421 is a deficient number, since it is larger than the sum of its proper divisors (196897725819).

442405100421 is a wasteful number, since it uses less digits than its factorization.

442405100421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21018216 (or 21018213 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 442405100421 its reverse (124001504244), we get a palindrome (566406604665).

The spelling of 442405100421 in words is "four hundred forty-two billion, four hundred five million, one hundred thousand, four hundred twenty-one".