135129601 has 2 divisors, whose sum is σ = 135129602. Its totient is φ = 135129600.

The previous prime is 135129593. The next prime is 135129611. The reversal of 135129601 is 106921531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73977201 + 61152400 = 8601^2 + 7820^2 .

It is a cyclic number.

It is not a de Polignac number, because 135129601 - 2³ = 135129593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135129601.

It is not a weakly prime, because it can be changed into another prime (135129611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67564800 + 67564801.

It is an arithmetic number, because the mean of its divisors is an integer number (67564801).

Almost surely, 2^135129601 is an apocalyptic number.

It is an amenable number.

135129601 is a deficient number, since it is larger than the sum of its proper divisors (1).

135129601 is an equidigital number, since it uses as much as digits as its factorization.

135129601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 135129601 is about 11624.5258397923. The cubic root of 135129601 is about 513.1568904573.

The spelling of 135129601 in words is "one hundred thirty-five million, one hundred twenty-nine thousand, six hundred one".