1420001543 has 2 divisors, whose sum is σ = 1420001544. Its totient is φ = 1420001542.

The previous prime is 1420001519. The next prime is 1420001549. The reversal of 1420001543 is 3451000241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1420001543 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420001549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710000771 + 710000772.

It is an arithmetic number, because the mean of its divisors is an integer number (710000772).

Almost surely, 2^1420001543 is an apocalyptic number.

1420001543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420001543 is an equidigital number, since it uses as much as digits as its factorization.

1420001543 is an evil number, because the sum of its binary digits is even.

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

The square root of 1420001543 is about 37682.9078363122. The cubic root of 1420001543 is about 1123.9912717310.

Adding to 1420001543 its reverse (3451000241), we get a palindrome (4871001784).

The spelling of 1420001543 in words is "one billion, four hundred twenty million, one thousand, five hundred forty-three".