1421020443 has 8 divisors (see below), whose sum is σ = 1905646608. Its totient is φ = 941870624.

The previous prime is 1421020427. The next prime is 1421020451. The reversal of 1421020443 is 3440201241.

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

It is a cyclic number.

It is not a de Polignac number, because 1421020443 - 2⁴ = 1421020427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421020453) 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, 1368480 + ... + 1369517.

It is an arithmetic number, because the mean of its divisors is an integer number (238205826).

Almost surely, 2^1421020443 is an apocalyptic number.

1421020443 is a deficient number, since it is larger than the sum of its proper divisors (484626165).

1421020443 is a wasteful number, since it uses less digits than its factorization.

1421020443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738173.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1421020443 is about 37696.4248039519. The cubic root of 1421020443 is about 1124.2600416034.

Adding to 1421020443 its reverse (3440201241), we get a palindrome (4861221684).

The spelling of 1421020443 in words is "one billion, four hundred twenty-one million, twenty thousand, four hundred forty-three".