120642123 has 8 divisors (see below), whose sum is σ = 183835648. Its totient is φ = 68938344.

The previous prime is 120642121. The next prime is 120642139. The reversal of 120642123 is 321246021.

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

It is not a de Polignac number, because 120642123 - 2¹ = 120642121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5744863 = 120642123 / (1 + 2 + 0 + 6 + 4 + 2 + 1 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120642123.

It is not an unprimeable number, because it can be changed into a prime (120642121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2872411 + ... + 2872452.

It is an arithmetic number, because the mean of its divisors is an integer number (22979456).

Almost surely, 2^120642123 is an apocalyptic number.

120642123 is a deficient number, since it is larger than the sum of its proper divisors (63193525).

120642123 is an equidigital number, since it uses as much as digits as its factorization.

120642123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744873.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 120642123 is about 10983.7208176464. The cubic root of 120642123 is about 494.1206344299.

Adding to 120642123 its reverse (321246021), we get a palindrome (441888144).

The spelling of 120642123 in words is "one hundred twenty million, six hundred forty-two thousand, one hundred twenty-three".