1421704224 has 240 divisors, whose sum is σ = 4346939520. Its totient is φ = 455569920.

The previous prime is 1421704223. The next prime is 1421704231. The reversal of 1421704224 is 4224071241.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1421704223) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10852639 + ... + 10852769.

It is an arithmetic number, because the mean of its divisors is an integer number (18112248).

Almost surely, 2^1421704224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421704224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2173469760).

1421704224 is an abundant number, since it is smaller than the sum of its proper divisors (2925235296).

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

1421704224 is a wasteful number, since it uses less digits than its factorization.

1421704224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 1421704224 is about 37705.4932867878. The cubic root of 1421704224 is about 1124.4403402960.

Adding to 1421704224 its reverse (4224071241), we get a palindrome (5645775465).

The spelling of 1421704224 in words is "one billion, four hundred twenty-one million, seven hundred four thousand, two hundred twenty-four".