123242145134 has 32 divisors (see below), whose sum is σ = 188580877056. Its totient is φ = 60392027520.

The previous prime is 123242145121. The next prime is 123242145137. The reversal of 123242145134 is 431541242321.

It is a self number, because there is not a number n which added to its sum of digits gives 123242145134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123242145137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24710189 + ... + 24715175.

It is an arithmetic number, because the mean of its divisors is an integer number (5893152408).

Almost surely, 2^123242145134 is an apocalyptic number.

123242145134 is a deficient number, since it is larger than the sum of its proper divisors (65338731922).

123242145134 is a wasteful number, since it uses less digits than its factorization.

123242145134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960.

The product of its digits is 23040, while the sum is 32.

Adding to 123242145134 its reverse (431541242321), we get a palindrome (554783387455).

The spelling of 123242145134 in words is "one hundred twenty-three billion, two hundred forty-two million, one hundred forty-five thousand, one hundred thirty-four".