1421443 has 4 divisors (see below), whose sum is σ = 1467328. Its totient is φ = 1375560.

The previous prime is 1421437. The next prime is 1421449. The reversal of 1421443 is 3441241.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1421437) and next prime (1421449).

It is a cyclic number.

It is not a de Polignac number, because 1421443 - 2⁹ = 1420931 is a prime.

It is a Duffinian number.

1421443 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421443.

It is not an unprimeable number, because it can be changed into a prime (1421449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22896 + ... + 22957.

It is an arithmetic number, because the mean of its divisors is an integer number (366832).

2^1421443 is an apocalyptic number.

1421443 is a deficient number, since it is larger than the sum of its proper divisors (45885).

1421443 is an equidigital number, since it uses as much as digits as its factorization.

1421443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45884.

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

The square root of 1421443 is about 1192.2428443904. The cubic root of 1421443 is about 112.4371467838.

Adding to 1421443 its reverse (3441241), we get a palindrome (4862684).

The spelling of 1421443 in words is "one million, four hundred twenty-one thousand, four hundred forty-three".