1421543 has 2 divisors, whose sum is σ = 1421544. Its totient is φ = 1421542.

The previous prime is 1421527. The next prime is 1421549. The reversal of 1421543 is 3451241.

It is a strong prime.

It is an emirp because it is prime and its reverse (3451241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421543 - 2⁴ = 1421527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710771 + 710772.

It is an arithmetic number, because the mean of its divisors is an integer number (710772).

2^1421543 is an apocalyptic number.

1421543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421543 is an equidigital number, since it uses as much as digits as its factorization.

1421543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 20.

The square root of 1421543 is about 1192.2847814176. The cubic root of 1421543 is about 112.4397834122.

Adding to 1421543 its reverse (3451241), we get a palindrome (4872784).

The spelling of 1421543 in words is "one million, four hundred twenty-one thousand, five hundred forty-three".