123511253142 has 16 divisors (see below), whose sum is σ = 247030288560. Its totient is φ = 41169120672.

The previous prime is 123511253119. The next prime is 123511253147. The reversal of 123511253142 is 241352115321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123511253147) 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, 106713 + ... + 508340.

It is an arithmetic number, because the mean of its divisors is an integer number (15439393035).

Almost surely, 2^123511253142 is an apocalyptic number.

123511253142 is an abundant number, since it is smaller than the sum of its proper divisors (123519035418).

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

123511253142 is a wasteful number, since it uses less digits than its factorization.

123511253142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648527.

The product of its digits is 7200, while the sum is 30.

Adding to 123511253142 its reverse (241352115321), we get a palindrome (364863368463).

The spelling of 123511253142 in words is "one hundred twenty-three billion, five hundred eleven million, two hundred fifty-three thousand, one hundred forty-two".