135410521 has 2 divisors, whose sum is σ = 135410522. Its totient is φ = 135410520.

The previous prime is 135410519. The next prime is 135410543. The reversal of 135410521 is 125014531.

It is a happy number.

It is an a-pointer prime, because the next prime (135410543) can be obtained adding 135410521 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106894921 + 28515600 = 10339^2 + 5340^2 .

It is a cyclic number.

It is not a de Polignac number, because 135410521 - 2¹ = 135410519 is a prime.

Together with 135410519, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 135410492 and 135410501.

It is not a weakly prime, because it can be changed into another prime (135410501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67705260 + 67705261.

It is an arithmetic number, because the mean of its divisors is an integer number (67705261).

Almost surely, 2^135410521 is an apocalyptic number.

It is an amenable number.

135410521 is a deficient number, since it is larger than the sum of its proper divisors (1).

135410521 is an equidigital number, since it uses as much as digits as its factorization.

135410521 is an odious number, because the sum of its binary digits is odd.

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

The square root of 135410521 is about 11636.6026399461. The cubic root of 135410521 is about 513.5122437695.

The spelling of 135410521 in words is "one hundred thirty-five million, four hundred ten thousand, five hundred twenty-one".