1421000443 has 8 divisors (see below), whose sum is σ = 1496693520. Its totient is φ = 1345397760.

The previous prime is 1421000431. The next prime is 1421000447. The reversal of 1421000443 is 3440001241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421000443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421000443.

It is not an unprimeable number, because it can be changed into a prime (1421000447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10971 + ... + 54427.

It is an arithmetic number, because the mean of its divisors is an integer number (187086690).

Almost surely, 2^1421000443 is an apocalyptic number.

1421000443 is a deficient number, since it is larger than the sum of its proper divisors (75693077).

1421000443 is a wasteful number, since it uses less digits than its factorization.

1421000443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45197.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1421000443 is about 37696.1595258721. The cubic root of 1421000443 is about 1124.2547671528.

Adding to 1421000443 its reverse (3440001241), we get a palindrome (4861001684).

The spelling of 1421000443 in words is "one billion, four hundred twenty-one million, four hundred forty-three", and thus it is an aban number.