123916842 has 144 divisors (see below), whose sum is σ = 337925952. Its totient is φ = 32117760.

The previous prime is 123916831. The next prime is 123916861. The reversal of 123916842 is 248619321.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 123916797 and 123916806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1492933 + ... + 1493015.

It is an arithmetic number, because the mean of its divisors is an integer number (2346708).

Almost surely, 2^123916842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123916842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168962976).

123916842 is an abundant number, since it is smaller than the sum of its proper divisors (214009110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123916842 is a wasteful number, since it uses less digits than its factorization.

123916842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 153 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 123916842 is about 11131.7941950074. The cubic root of 123916842 is about 498.5515976460.

It can be divided in two parts, 1239 and 16842, that added together give a palindrome (18081).

The spelling of 123916842 in words is "one hundred twenty-three million, nine hundred sixteen thousand, eight hundred forty-two".