136512123 has 16 divisors (see below), whose sum is σ = 199366272. Its totient is φ = 82400000.

The previous prime is 136512121. The next prime is 136512149. The reversal of 136512123 is 321215631.

It is a cyclic number.

It is not a de Polignac number, because 136512123 - 2¹ = 136512121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136512093 and 136512102.

It is not an unprimeable number, because it can be changed into a prime (136512121) 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 15 ways as a sum of consecutive naturals, for example, 43 + ... + 16523.

It is an arithmetic number, because the mean of its divisors is an integer number (12460392).

Almost surely, 2^136512123 is an apocalyptic number.

136512123 is a deficient number, since it is larger than the sum of its proper divisors (62854149).

136512123 is a wasteful number, since it uses less digits than its factorization.

136512123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16746.

The product of its digits is 1080, while the sum is 24.

The square root of 136512123 is about 11683.8402505341. The cubic root of 136512123 is about 514.9010058884.

Adding to 136512123 its reverse (321215631), we get a palindrome (457727754).

The spelling of 136512123 in words is "one hundred thirty-six million, five hundred twelve thousand, one hundred twenty-three".