1242181043 has 2 divisors, whose sum is σ = 1242181044. Its totient is φ = 1242181042.

The previous prime is 1242181037. The next prime is 1242181051. The reversal of 1242181043 is 3401812421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242181043 - 2¹⁰ = 1242180019 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1242187043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621090521 + 621090522.

It is an arithmetic number, because the mean of its divisors is an integer number (621090522).

Almost surely, 2^1242181043 is an apocalyptic number.

1242181043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242181043 is an equidigital number, since it uses as much as digits as its factorization.

1242181043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1242181043 is about 35244.5888470840. The cubic root of 1242181043 is about 1074.9665878925.

Adding to 1242181043 its reverse (3401812421), we get a palindrome (4643993464).

The spelling of 1242181043 in words is "one billion, two hundred forty-two million, one hundred eighty-one thousand, forty-three".