1123142343 has 4 divisors (see below), whose sum is σ = 1497523128. Its totient is φ = 748761560.

The previous prime is 1123142341. The next prime is 1123142357. The reversal of 1123142343 is 3432413211.

It is a happy number.

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 1123142343 - 2¹ = 1123142341 is a prime.

It is a super-2 number, since 2×1123142343² = 2522897445279059298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123142341) 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, 187190388 + ... + 187190393.

It is an arithmetic number, because the mean of its divisors is an integer number (374380782).

Almost surely, 2^1123142343 is an apocalyptic number.

1123142343 is a deficient number, since it is larger than the sum of its proper divisors (374380785).

1123142343 is an equidigital number, since it uses as much as digits as its factorization.

1123142343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374380784.

The product of its digits is 1728, while the sum is 24.

The square root of 1123142343 is about 33513.3159057709. The cubic root of 1123142343 is about 1039.4691395135.

Adding to 1123142343 its reverse (3432413211), we get a palindrome (4555555554).

The spelling of 1123142343 in words is "one billion, one hundred twenty-three million, one hundred forty-two thousand, three hundred forty-three".