123742145642 has 8 divisors (see below), whose sum is σ = 185614742916. Its totient is φ = 61870564672.

The previous prime is 123742145617. The next prime is 123742145663. The reversal of 123742145642 is 246541247321.

123742145642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 70787391481 + 52954754161 = 266059^2 + 230119^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 123742145642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251618 + ... + 557490.

Almost surely, 2^123742145642 is an apocalyptic number.

123742145642 is a deficient number, since it is larger than the sum of its proper divisors (61872597274).

123742145642 is a wasteful number, since it uses less digits than its factorization.

123742145642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508152.

The product of its digits is 322560, while the sum is 41.

The spelling of 123742145642 in words is "one hundred twenty-three billion, seven hundred forty-two million, one hundred forty-five thousand, six hundred forty-two".