1241245543 has 4 divisors (see below), whose sum is σ = 1249576200. Its totient is φ = 1232914888.

The previous prime is 1241245541. The next prime is 1241245571. The reversal of 1241245543 is 3455421421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3455421421 = 9157 ⋅377353.

It is a cyclic number.

It is not a de Polignac number, because 1241245543 - 2¹ = 1241245541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241245541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4165105 + ... + 4165402.

It is an arithmetic number, because the mean of its divisors is an integer number (312394050).

Almost surely, 2^1241245543 is an apocalyptic number.

1241245543 is a deficient number, since it is larger than the sum of its proper divisors (8330657).

1241245543 is an equidigital number, since it uses as much as digits as its factorization.

1241245543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8330656.

The product of its digits is 19200, while the sum is 31.

The square root of 1241245543 is about 35231.3148065751. The cubic root of 1241245543 is about 1074.6966637927.

Adding to 1241245543 its reverse (3455421421), we get a palindrome (4696666964).

The spelling of 1241245543 in words is "one billion, two hundred forty-one million, two hundred forty-five thousand, five hundred forty-three".