136129 has 4 divisors (see below), whose sum is σ = 155584. Its totient is φ = 116676.

The previous prime is 136111. The next prime is 136133. The reversal of 136129 is 921631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 921631 = 563 ⋅1637.

It is not a de Polignac number, because 136129 - 2⁹ = 135617 is a prime.

It is a super-2 number, since 2×136129² = 37062209282, which contains 22 as substring.

It is a Duffinian number.

136129 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (136139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9717 + ... + 9730.

It is an arithmetic number, because the mean of its divisors is an integer number (38896).

2¹³⁶¹²⁹ is an apocalyptic number.

It is an amenable number.

136129 is a deficient number, since it is larger than the sum of its proper divisors (19455).

136129 is an equidigital number, since it uses as much as digits as its factorization.

136129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19454.

The product of its digits is 324, while the sum is 22.

The square root of 136129 is about 368.9566370185. The cubic root of 136129 is about 51.4418862497.

The spelling of 136129 in words is "one hundred thirty-six thousand, one hundred twenty-nine".