123542405131 has 8 divisors (see below), whose sum is σ = 130588761600. Its totient is φ = 116550461160.

The previous prime is 123542405101. The next prime is 123542405141. The reversal of 123542405131 is 131504245321.

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 123542405131 - 2⁵ = 123542405099 is a prime.

It is a super-2 number, since 2×123542405131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123542405093 and 123542405102.

It is not an unprimeable number, because it can be changed into a prime (123542405101) 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, 13598455 + ... + 13607536.

It is an arithmetic number, because the mean of its divisors is an integer number (16323595200).

Almost surely, 2^123542405131 is an apocalyptic number.

123542405131 is a deficient number, since it is larger than the sum of its proper divisors (7046356469).

123542405131 is a wasteful number, since it uses less digits than its factorization.

123542405131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27206249.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 123542405131 in words is "one hundred twenty-three billion, five hundred forty-two million, four hundred five thousand, one hundred thirty-one".