135250081 has 2 divisors, whose sum is σ = 135250082. Its totient is φ = 135250080.

The previous prime is 135250069. The next prime is 135250091. The reversal of 135250081 is 180052531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83539600 + 51710481 = 9140^2 + 7191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135250081 is a prime.

It is a super-2 number, since 2×135250081² = 36585168821013122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135250091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67625040 + 67625041.

It is an arithmetic number, because the mean of its divisors is an integer number (67625041).

Almost surely, 2^135250081 is an apocalyptic number.

It is an amenable number.

135250081 is a deficient number, since it is larger than the sum of its proper divisors (1).

135250081 is an equidigital number, since it uses as much as digits as its factorization.

135250081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 135250081 is about 11629.7068320745. The cubic root of 135250081 is about 513.3093534178.

The spelling of 135250081 in words is "one hundred thirty-five million, two hundred fifty thousand, eighty-one".