4221400 has 24 divisors (see below), whose sum is σ = 9815220. Its totient is φ = 1688480.

The previous prime is 4221379. The next prime is 4221407. The reversal of 4221400 is 41224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10354 + ... + 10753.

Almost surely, 2^4221400 is an apocalyptic number.

4221400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4221400 is an abundant number, since it is smaller than the sum of its proper divisors (5593820).

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

4221400 is a wasteful number, since it uses less digits than its factorization.

4221400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21123 (or 21114 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4221400 is about 2054.6045848289. The cubic root of 4221400 is about 161.6164272749.

Adding to 4221400 its reverse (41224), we get a palindrome (4262624).

The spelling of 4221400 in words is "four million, two hundred twenty-one thousand, four hundred".