1421444321 has 16 divisors (see below), whose sum is σ = 1703255040. Its totient is φ = 1170979920.

The previous prime is 1421444287. The next prime is 1421444351. The reversal of 1421444321 is 1234441241.

It is a de Polignac number, because none of the positive numbers 2^k-1421444321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421444351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143045 + ... + 152658.

It is an arithmetic number, because the mean of its divisors is an integer number (106453440).

Almost surely, 2^1421444321 is an apocalyptic number.

1421444321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1421444321 is a deficient number, since it is larger than the sum of its proper divisors (281810719).

1421444321 is a wasteful number, since it uses less digits than its factorization.

1421444321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295756.

The product of its digits is 3072, while the sum is 26.

The square root of 1421444321 is about 37702.0466420591. The cubic root of 1421444321 is about 1124.3718161442.

Adding to 1421444321 its reverse (1234441241), we get a palindrome (2655885562).

The spelling of 1421444321 in words is "one billion, four hundred twenty-one million, four hundred forty-four thousand, three hundred twenty-one".