1243442343 has 36 divisors (see below), whose sum is σ = 1973406120. Its totient is φ = 695597760.

The previous prime is 1243442341. The next prime is 1243442357. The reversal of 1243442343 is 3432443421.

It is a happy number.

It is not a de Polignac number, because 1243442343 - 2¹ = 1243442341 is a prime.

It is a super-2 number, since 2×1243442343² = 3092297720730659298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1243442343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243442341) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51213 + ... + 71481.

Almost surely, 2^1243442343 is an apocalyptic number.

1243442343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1243442343 is a deficient number, since it is larger than the sum of its proper divisors (729963777).

1243442343 is a wasteful number, since it uses less digits than its factorization.

1243442343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20320 (or 20296 counting only the distinct ones).

The product of its digits is 27648, while the sum is 30.

The square root of 1243442343 is about 35262.4778340944. The cubic root of 1243442343 is about 1075.3303021073.

Adding to 1243442343 its reverse (3432443421), we get a palindrome (4675885764).

The spelling of 1243442343 in words is "one billion, two hundred forty-three million, four hundred forty-two thousand, three hundred forty-three".