1243123134 has 16 divisors (see below), whose sum is σ = 2712268800. Its totient is φ = 376703960.

The previous prime is 1243123103. The next prime is 1243123187. The reversal of 1243123134 is 4313213421.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9417534 + ... + 9417665.

It is an arithmetic number, because the mean of its divisors is an integer number (169516800).

Almost surely, 2^1243123134 is an apocalyptic number.

1243123134 is an abundant number, since it is smaller than the sum of its proper divisors (1469145666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243123134 is a wasteful number, since it uses less digits than its factorization.

1243123134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18835215.

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

The square root of 1243123134 is about 35257.9513585234. The cubic root of 1243123134 is about 1075.2382768010.

Adding to 1243123134 its reverse (4313213421), we get a palindrome (5556336555).

The spelling of 1243123134 in words is "one billion, two hundred forty-three million, one hundred twenty-three thousand, one hundred thirty-four".