123645242 has 16 divisors (see below), whose sum is σ = 212775552. Its totient is φ = 52787760.

The previous prime is 123645229. The next prime is 123645259. The reversal of 123645242 is 242546321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13109 + ... + 20472.

It is an arithmetic number, because the mean of its divisors is an integer number (13298472).

Almost surely, 2^123645242 is an apocalyptic number.

123645242 is a deficient number, since it is larger than the sum of its proper divisors (89130310).

123645242 is a wasteful number, since it uses less digits than its factorization.

123645242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33853.

The product of its digits is 11520, while the sum is 29.

The square root of 123645242 is about 11119.5882117999. The cubic root of 123645242 is about 498.1870906640.

The spelling of 123645242 in words is "one hundred twenty-three million, six hundred forty-five thousand, two hundred forty-two".