422121400 has 96 divisors (see below), whose sum is σ = 1012435200. Its totient is φ = 163606400.

The previous prime is 422121397. The next prime is 422121421. The reversal of 422121400 is 4121224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 979185 + ... + 979615.

It is an arithmetic number, because the mean of its divisors is an integer number (10546200).

Almost surely, 2^422121400 is an apocalyptic number.

422121400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422121400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (506217600).

422121400 is an abundant number, since it is smaller than the sum of its proper divisors (590313800).

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

422121400 is a wasteful number, since it uses less digits than its factorization.

422121400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 422121400 is about 20545.5932014629. The cubic root of 422121400 is about 750.1459863969.

Adding to 422121400 its reverse (4121224), we get a palindrome (426242624).

The spelling of 422121400 in words is "four hundred twenty-two million, one hundred twenty-one thousand, four hundred".