1421543244 has 96 divisors (see below), whose sum is σ = 3818949120. Its totient is φ = 407334400.

The previous prime is 1421543191. The next prime is 1421543251. The reversal of 1421543244 is 4423451241.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267574 + ... + 272834.

It is an arithmetic number, because the mean of its divisors is an integer number (39780720).

Almost surely, 2^1421543244 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 1421543244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909474560).

1421543244 is an abundant number, since it is smaller than the sum of its proper divisors (2397405876).

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

1421543244 is a wasteful number, since it uses less digits than its factorization.

1421543244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5391 (or 5389 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 1421543244 is about 37703.3585241421. The cubic root of 1421543244 is about 1124.3978984539.

Adding to 1421543244 its reverse (4423451241), we get a palindrome (5844994485).

The spelling of 1421543244 in words is "one billion, four hundred twenty-one million, five hundred forty-three thousand, two hundred forty-four".