1242444043 has 4 divisors (see below), whose sum is σ = 1246491400. Its totient is φ = 1238396688.

The previous prime is 1242444017. The next prime is 1242444083. The reversal of 1242444043 is 3404442421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1242444043 - 2⁵ = 1242444011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242444083) 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, 2023218 + ... + 2023831.

It is an arithmetic number, because the mean of its divisors is an integer number (311622850).

Almost surely, 2^1242444043 is an apocalyptic number.

1242444043 is a deficient number, since it is larger than the sum of its proper divisors (4047357).

1242444043 is an equidigital number, since it uses as much as digits as its factorization.

1242444043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4047356.

The product of its (nonzero) digits is 12288, while the sum is 28.

The square root of 1242444043 is about 35248.3197188178. The cubic root of 1242444043 is about 1075.0424480805.

Adding to 1242444043 its reverse (3404442421), we get a palindrome (4646886464).

The spelling of 1242444043 in words is "one billion, two hundred forty-two million, four hundred forty-four thousand, forty-three".