1203421543 has 2 divisors, whose sum is σ = 1203421544. Its totient is φ = 1203421542.

The previous prime is 1203421537. The next prime is 1203421553. The reversal of 1203421543 is 3451243021.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203421543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203421523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601710771 + 601710772.

It is an arithmetic number, because the mean of its divisors is an integer number (601710772).

Almost surely, 2^1203421543 is an apocalyptic number.

1203421543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203421543 is an equidigital number, since it uses as much as digits as its factorization.

1203421543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1203421543 is about 34690.3667175774. The cubic root of 1203421543 is about 1063.6675918933.

Adding to 1203421543 its reverse (3451243021), we get a palindrome (4654664564).

The spelling of 1203421543 in words is "one billion, two hundred three million, four hundred twenty-one thousand, five hundred forty-three".