123542531241253 has 8 divisors (see below), whose sum is σ = 125246511740376. Its totient is φ = 121838864716800.

The previous prime is 123542531241209. The next prime is 123542531241263. The reversal of 123542531241253 is 352142135245321.

It can be written as a sum of positive squares in 4 ways, for example, as 3018623364 + 123539512617889 = 54942^2 + 11114833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123542531241253 - 2⁹ = 123542531240741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123542531241263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77701228 + ... + 79275253.

It is an arithmetic number, because the mean of its divisors is an integer number (15655813967547).

Almost surely, 2^{123542531241253} is an apocalyptic number.

It is an amenable number.

123542531241253 is a deficient number, since it is larger than the sum of its proper divisors (1703980499123).

123542531241253 is a wasteful number, since it uses less digits than its factorization.

123542531241253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156987335.

The product of its digits is 864000, while the sum is 43.

Adding to 123542531241253 its reverse (352142135245321), we get a palindrome (475684666486574).

The spelling of 123542531241253 in words is "one hundred twenty-three trillion, five hundred forty-two billion, five hundred thirty-one million, two hundred forty-one thousand, two hundred fifty-three".