135184121 has 4 divisors (see below), whose sum is σ = 136447632. Its totient is φ = 133920612.

The previous prime is 135184111. The next prime is 135184123. The reversal of 135184121 is 121481531.

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: 121481531 = 59 ⋅2059009.

It is a cyclic number.

It is not a de Polignac number, because 135184121 - 2⁶ = 135184057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135184123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631595 + ... + 631808.

It is an arithmetic number, because the mean of its divisors is an integer number (34111908).

Almost surely, 2^135184121 is an apocalyptic number.

It is an amenable number.

135184121 is a deficient number, since it is larger than the sum of its proper divisors (1263511).

135184121 is a wasteful number, since it uses less digits than its factorization.

135184121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263510.

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

The square root of 135184121 is about 11626.8706451908. The cubic root of 135184121 is about 513.2258947112.

The spelling of 135184121 in words is "one hundred thirty-five million, one hundred eighty-four thousand, one hundred twenty-one".