1241501543 has 2 divisors, whose sum is σ = 1241501544. Its totient is φ = 1241501542.

The previous prime is 1241501531. The next prime is 1241501557. The reversal of 1241501543 is 3451051421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1241501543 - 2⁶ = 1241501479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1241500543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620750771 + 620750772.

It is an arithmetic number, because the mean of its divisors is an integer number (620750772).

Almost surely, 2^1241501543 is an apocalyptic number.

1241501543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241501543 is an equidigital number, since it uses as much as digits as its factorization.

1241501543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1241501543 is about 35234.9477507772. The cubic root of 1241501543 is about 1074.7705421202.

Adding to 1241501543 its reverse (3451051421), we get a palindrome (4692552964).

The spelling of 1241501543 in words is "one billion, two hundred forty-one million, five hundred one thousand, five hundred forty-three".