123718842 has 48 divisors (see below), whose sum is σ = 303881760. Its totient is φ = 36062496.

The previous prime is 123718813. The next prime is 123718871. The reversal of 123718842 is 248817321.

It is an interprime number because it is at equal distance from previous prime (123718813) and next prime (123718871).

It is a junction number, because it is equal to n+sod(n) for n = 123718797 and 123718806.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9468 + ... + 18359.

It is an arithmetic number, because the mean of its divisors is an integer number (6330870).

Almost surely, 2^123718842 is an apocalyptic number.

123718842 is an abundant number, since it is smaller than the sum of its proper divisors (180162918).

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

123718842 is a wasteful number, since it uses less digits than its factorization.

123718842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27867 (or 27864 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 123718842 is about 11122.8971945263. The cubic root of 123718842 is about 498.2859199070.

The spelling of 123718842 in words is "one hundred twenty-three million, seven hundred eighteen thousand, eight hundred forty-two".