442121100 has 36 divisors (see below), whose sum is σ = 1279204584. Its totient is φ = 117898880.

The previous prime is 442121083. The next prime is 442121143. The reversal of 442121100 is 1121244.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 442121100.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 736569 + ... + 737168.

Almost surely, 2^442121100 is an apocalyptic number.

It is an amenable number.

442121100 is an abundant number, since it is smaller than the sum of its proper divisors (837083484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442121100 is a wasteful number, since it uses less digits than its factorization.

442121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473754 (or 1473747 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 442121100 is about 21026.6759141810. The cubic root of 442121100 is about 761.8107217204.

Adding to 442121100 its reverse (1121244), we get a palindrome (443242344).

The spelling of 442121100 in words is "four hundred forty-two million, one hundred twenty-one thousand, one hundred".