123434105 has 4 divisors (see below), whose sum is σ = 148120932. Its totient is φ = 98747280.

The previous prime is 123434083. The next prime is 123434111. The reversal of 123434105 is 501434321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37982569 + 85451536 = 6163^2 + 9244^2 .

It is not a de Polignac number, because 123434105 - 2⁶ = 123434041 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12343406 + ... + 12343415.

It is an arithmetic number, because the mean of its divisors is an integer number (37030233).

Almost surely, 2^123434105 is an apocalyptic number.

It is an amenable number.

123434105 is a deficient number, since it is larger than the sum of its proper divisors (24686827).

123434105 is an equidigital number, since it uses as much as digits as its factorization.

123434105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24686826.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 123434105 is about 11110.0902336570. The cubic root of 123434105 is about 497.9033604944.

Adding to 123434105 its reverse (501434321), we get a palindrome (624868426).

The spelling of 123434105 in words is "one hundred twenty-three million, four hundred thirty-four thousand, one hundred five".