1421444244 has 48 divisors (see below), whose sum is σ = 3716024256. Its totient is φ = 419097600.

The previous prime is 1421444243. The next prime is 1421444267. The reversal of 1421444244 is 4424441241.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421444243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140637 + ... + 150404.

It is an arithmetic number, because the mean of its divisors is an integer number (77417172).

Almost surely, 2^1421444244 is an apocalyptic number.

It is an amenable number.

1421444244 is an abundant number, since it is smaller than the sum of its proper divisors (2294580012).

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

1421444244 is a wasteful number, since it uses less digits than its factorization.

1421444244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291096 (or 291094 counting only the distinct ones).

The product of its digits is 16384, while the sum is 30.

The square root of 1421444244 is about 37702.0456208944. The cubic root of 1421444244 is about 1124.3717958417.

Adding to 1421444244 its reverse (4424441241), we get a palindrome (5845885485).

The spelling of 1421444244 in words is "one billion, four hundred twenty-one million, four hundred forty-four thousand, two hundred forty-four".