123865712 has 40 divisors (see below), whose sum is σ = 253473360. Its totient is φ = 58475520.

The previous prime is 123865711. The next prime is 123865733. The reversal of 123865712 is 217568321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123865711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131162 + ... + 132102.

It is an arithmetic number, because the mean of its divisors is an integer number (6336834).

Almost surely, 2^123865712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123865712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126736680).

123865712 is an abundant number, since it is smaller than the sum of its proper divisors (129607648).

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

123865712 is a wasteful number, since it uses less digits than its factorization.

123865712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401 (or 1395 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 123865712 is about 11129.4973830807. The cubic root of 123865712 is about 498.4830181869.

The spelling of 123865712 in words is "one hundred twenty-three million, eight hundred sixty-five thousand, seven hundred twelve".