135122521 has 8 divisors (see below), whose sum is σ = 140374784. Its totient is φ = 129926160.

The previous prime is 135122479. The next prime is 135122527. The reversal of 135122521 is 125221531.

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 135122521 - 2¹¹ = 135120473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135122492 and 135122501.

It is not an unprimeable number, because it can be changed into a prime (135122527) 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 7 ways as a sum of consecutive naturals, for example, 9015 + ... + 18748.

It is an arithmetic number, because the mean of its divisors is an integer number (17546848).

Almost surely, 2^135122521 is an apocalyptic number.

It is an amenable number.

135122521 is a deficient number, since it is larger than the sum of its proper divisors (5252263).

135122521 is a wasteful number, since it uses less digits than its factorization.

135122521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27951.

The product of its digits is 600, while the sum is 22.

The square root of 135122521 is about 11624.2213072532. The cubic root of 135122521 is about 513.1479281618.

The spelling of 135122521 in words is "one hundred thirty-five million, one hundred twenty-two thousand, five hundred twenty-one".