135134521 has 2 divisors, whose sum is σ = 135134522. Its totient is φ = 135134520.

The previous prime is 135134501. The next prime is 135134557. The reversal of 135134521 is 125431531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90725625 + 44408896 = 9525^2 + 6664^2 .

It is an emirp because it is prime and its reverse (125431531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135134521 is a prime.

It is a super-2 number, since 2×135134521² = 36522677531798882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135134501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67567260 + 67567261.

It is an arithmetic number, because the mean of its divisors is an integer number (67567261).

Almost surely, 2^135134521 is an apocalyptic number.

It is an amenable number.

135134521 is a deficient number, since it is larger than the sum of its proper divisors (1).

135134521 is an equidigital number, since it uses as much as digits as its factorization.

135134521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 135134521 is about 11624.7374594010. The cubic root of 135134521 is about 513.1631183088.

The spelling of 135134521 in words is "one hundred thirty-five million, one hundred thirty-four thousand, five hundred twenty-one".