1243241443 has 4 divisors (see below), whose sum is σ = 1243871640. Its totient is φ = 1242611248.

The previous prime is 1243241431. The next prime is 1243241521. The reversal of 1243241443 is 3441423421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3441423421 = 10859 ⋅316919.

It is a cyclic number.

It is not a de Polignac number, because 1243241443 - 2²⁹ = 706370531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243241423) 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, 312130 + ... + 316087.

It is an arithmetic number, because the mean of its divisors is an integer number (310967910).

Almost surely, 2^1243241443 is an apocalyptic number.

1243241443 is a deficient number, since it is larger than the sum of its proper divisors (630197).

1243241443 is an equidigital number, since it uses as much as digits as its factorization.

1243241443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630196.

The product of its digits is 9216, while the sum is 28.

The square root of 1243241443 is about 35259.6290819969. The cubic root of 1243241443 is about 1075.2723861413.

Adding to 1243241443 its reverse (3441423421), we get a palindrome (4684664864).

The spelling of 1243241443 in words is "one billion, two hundred forty-three million, two hundred forty-one thousand, four hundred forty-three".