123404242142 has 16 divisors (see below), whose sum is σ = 186953564160. Its totient is φ = 61088417208.

The previous prime is 123404242061. The next prime is 123404242151. The reversal of 123404242142 is 241242404321.

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, 385478 + ... + 628809.

It is an arithmetic number, because the mean of its divisors is an integer number (11684597760).

Almost surely, 2^123404242142 is an apocalyptic number.

123404242142 is a deficient number, since it is larger than the sum of its proper divisors (63549322018).

123404242142 is a wasteful number, since it uses less digits than its factorization.

123404242142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014895.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 123404242142 its reverse (241242404321), we get a palindrome (364646646463).

The spelling of 123404242142 in words is "one hundred twenty-three billion, four hundred four million, two hundred forty-two thousand, one hundred forty-two".