123420142 has 8 divisors (see below), whose sum is σ = 186165000. Its totient is φ = 61365144.

The previous prime is 123420137. The next prime is 123420169. The reversal of 123420142 is 241024321.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172017 + ... + 172732.

It is an arithmetic number, because the mean of its divisors is an integer number (23270625).

Almost surely, 2^123420142 is an apocalyptic number.

123420142 is a deficient number, since it is larger than the sum of its proper divisors (62744858).

123420142 is a wasteful number, since it uses less digits than its factorization.

123420142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344930.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 123420142 is about 11109.4618231488. The cubic root of 123420142 is about 497.8845853301.

Adding to 123420142 its reverse (241024321), we get a palindrome (364444463).

The spelling of 123420142 in words is "one hundred twenty-three million, four hundred twenty thousand, one hundred forty-two".