1421233543 has 2 divisors, whose sum is σ = 1421233544. Its totient is φ = 1421233542.

The previous prime is 1421233487. The next prime is 1421233559. The reversal of 1421233543 is 3453321241.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3453321241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421233543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421233343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710616771 + 710616772.

It is an arithmetic number, because the mean of its divisors is an integer number (710616772).

Almost surely, 2^1421233543 is an apocalyptic number.

1421233543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421233543 is an equidigital number, since it uses as much as digits as its factorization.

1421233543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 28.

The square root of 1421233543 is about 37699.2512259859. The cubic root of 1421233543 is about 1124.3162378017.

Adding to 1421233543 its reverse (3453321241), we get a palindrome (4874554784).

The spelling of 1421233543 in words is "one billion, four hundred twenty-one million, two hundred thirty-three thousand, five hundred forty-three".