123404142 has 8 divisors (see below), whose sum is σ = 246808296. Its totient is φ = 41134712.

The previous prime is 123404129. The next prime is 123404147. The reversal of 123404142 is 241404321.

It is a sphenic number, since it is the product of 3 distinct primes.

123404142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123404147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10283673 + ... + 10283684.

It is an arithmetic number, because the mean of its divisors is an integer number (30851037).

Almost surely, 2^123404142 is an apocalyptic number.

123404142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

123404142 is a wasteful number, since it uses less digits than its factorization.

123404142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20567362.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 123404142 is about 11108.7416929191. The cubic root of 123404142 is about 497.8630693995.

Adding to 123404142 its reverse (241404321), we get a palindrome (364808463).

The spelling of 123404142 in words is "one hundred twenty-three million, four hundred four thousand, one hundred forty-two".