1243442163 has 4 divisors (see below), whose sum is σ = 1657922888. Its totient is φ = 828961440.

The previous prime is 1243442129. The next prime is 1243442183. The reversal of 1243442163 is 3612443421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3612443421 = 3 ⋅1204147807.

It is not a de Polignac number, because 1243442163 - 2¹² = 1243438067 is a prime.

It is a super-2 number, since 2×1243442163² = 3092296825452237138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1243442163.

It is not an unprimeable number, because it can be changed into a prime (1243442113) 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, 207240358 + ... + 207240363.

It is an arithmetic number, because the mean of its divisors is an integer number (414480722).

Almost surely, 2^1243442163 is an apocalyptic number.

1243442163 is a deficient number, since it is larger than the sum of its proper divisors (414480725).

1243442163 is an equidigital number, since it uses as much as digits as its factorization.

1243442163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414480724.

The product of its digits is 13824, while the sum is 30.

The square root of 1243442163 is about 35262.4752818063. The cubic root of 1243442163 is about 1075.3302502192.

Adding to 1243442163 its reverse (3612443421), we get a palindrome (4855885584).

The spelling of 1243442163 in words is "one billion, two hundred forty-three million, four hundred forty-two thousand, one hundred sixty-three".