123502521142 has 32 divisors (see below), whose sum is σ = 248732354304. Its totient is φ = 44416490400.

The previous prime is 123502521127. The next prime is 123502521143. The reversal of 123502521142 is 241125205321.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 123502521142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123502521143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30842784 + ... + 30846787.

It is an arithmetic number, because the mean of its divisors is an integer number (7772886072).

Almost surely, 2^123502521142 is an apocalyptic number.

123502521142 is an abundant number, since it is smaller than the sum of its proper divisors (125229833162).

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

123502521142 is a wasteful number, since it uses less digits than its factorization.

123502521142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61689604.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 123502521142 its reverse (241125205321), we get a palindrome (364627726463).

The spelling of 123502521142 in words is "one hundred twenty-three billion, five hundred two million, five hundred twenty-one thousand, one hundred forty-two".