135124181 has 4 divisors (see below), whose sum is σ = 142236000. Its totient is φ = 128012364.

The previous prime is 135124169. The next prime is 135124183. The reversal of 135124181 is 181421531.

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: 181421531 = 2939 ⋅61729.

It is a cyclic number.

It is not a de Polignac number, because 135124181 - 2⁶ = 135124117 is a prime.

It is a super-2 number, since 2×135124181² = 36517088581841522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135124181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135124183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3555881 + ... + 3555918.

It is an arithmetic number, because the mean of its divisors is an integer number (35559000).

Almost surely, 2^135124181 is an apocalyptic number.

It is an amenable number.

135124181 is a deficient number, since it is larger than the sum of its proper divisors (7111819).

135124181 is an equidigital number, since it uses as much as digits as its factorization.

135124181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7111818.

The product of its digits is 960, while the sum is 26.

The square root of 135124181 is about 11624.2927096663. The cubic root of 135124181 is about 513.1500295190.

The spelling of 135124181 in words is "one hundred thirty-five million, one hundred twenty-four thousand, one hundred eighty-one".