123688242 has 16 divisors (see below), whose sum is σ = 274862880. Its totient is φ = 41229396.

The previous prime is 123688237. The next prime is 123688247. The reversal of 123688242 is 242886321.

It is an interprime number because it is at equal distance from previous prime (123688237) and next prime (123688247).

It is a junction number, because it is equal to n+sod(n) for n = 123688197 and 123688206.

It is not an unprimeable number, because it can be changed into a prime (123688247) 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, 1145208 + ... + 1145315.

It is an arithmetic number, because the mean of its divisors is an integer number (17178930).

Almost surely, 2^123688242 is an apocalyptic number.

123688242 is an abundant number, since it is smaller than the sum of its proper divisors (151174638).

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

123688242 is a wasteful number, since it uses less digits than its factorization.

123688242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290534 (or 2290528 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 123688242 is about 11121.5215685625. The cubic root of 123688242 is about 498.2448353366.

The spelling of 123688242 in words is "one hundred twenty-three million, six hundred eighty-eight thousand, two hundred forty-two".