123604942 has 4 divisors (see below), whose sum is σ = 185407416. Its totient is φ = 61802470.

The previous prime is 123604913. The next prime is 123604963. The reversal of 123604942 is 249406321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 30901234 + ... + 30901237.

It is an arithmetic number, because the mean of its divisors is an integer number (46351854).

Almost surely, 2^123604942 is an apocalyptic number.

123604942 is a deficient number, since it is larger than the sum of its proper divisors (61802474).

123604942 is an equidigital number, since it uses as much as digits as its factorization.

123604942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61802473.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 123604942 is about 11117.7759466541. The cubic root of 123604942 is about 498.1329596650.

The spelling of 123604942 in words is "one hundred twenty-three million, six hundred four thousand, nine hundred forty-two".