123400001234 has 16 divisors (see below), whose sum is σ = 196305917688. Its totient is φ = 57976461312.

The previous prime is 123400001159. The next prime is 123400001239. The reversal of 123400001234 is 432100004321.

It can be written as a sum of positive squares in 4 ways, for example, as 104299932025 + 19100069209 = 322955^2 + 138203^2 .

It is not an unprimeable number, because it can be changed into a prime (123400001239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2920199 + ... + 2962154.

Almost surely, 2^123400001234 is an apocalyptic number.

123400001234 is a deficient number, since it is larger than the sum of its proper divisors (72905916454).

123400001234 is a wasteful number, since it uses less digits than its factorization.

123400001234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882989.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 123400001234 its reverse (432100004321), we get a palindrome (555500005555).

It can be divided in two parts, 12340000 and 1234, that multiplied together give a square (15227560000 = 123400²).

The spelling of 123400001234 in words is "one hundred twenty-three billion, four hundred million, one thousand, two hundred thirty-four".