605135521 has 2 divisors, whose sum is σ = 605135522. Its totient is φ = 605135520.

The previous prime is 605135513. The next prime is 605135533. The reversal of 605135521 is 125531506.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 575280225 + 29855296 = 23985^2 + 5464^2 .

It is a cyclic number.

It is not a de Polignac number, because 605135521 - 2³ = 605135513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 605135521.

It is not a weakly prime, because it can be changed into another prime (605135501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302567760 + 302567761.

It is an arithmetic number, because the mean of its divisors is an integer number (302567761).

Almost surely, 2^605135521 is an apocalyptic number.

It is an amenable number.

605135521 is a deficient number, since it is larger than the sum of its proper divisors (1).

605135521 is an equidigital number, since it uses as much as digits as its factorization.

605135521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 605135521 is about 24599.5024543181. The cubic root of 605135521 is about 845.8322023189.

The spelling of 605135521 in words is "six hundred five million, one hundred thirty-five thousand, five hundred twenty-one".