1242102443 has 4 divisors (see below), whose sum is σ = 1242321648. Its totient is φ = 1241883240.

The previous prime is 1242102437. The next prime is 1242102457. The reversal of 1242102443 is 3442012421.

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 1242102443 - 2⁴ = 1242102427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242102473) 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, 100871 + ... + 112512.

It is an arithmetic number, because the mean of its divisors is an integer number (310580412).

Almost surely, 2^1242102443 is an apocalyptic number.

1242102443 is a deficient number, since it is larger than the sum of its proper divisors (219205).

1242102443 is an equidigital number, since it uses as much as digits as its factorization.

1242102443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219204.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1242102443 is about 35243.4737646561. The cubic root of 1242102443 is about 1074.9439142904.

Adding to 1242102443 its reverse (3442012421), we get a palindrome (4684114864).

The spelling of 1242102443 in words is "one billion, two hundred forty-two million, one hundred two thousand, four hundred forty-three".