135881306 has 24 divisors (see below), whose sum is σ = 237221460. Its totient is φ = 58129280.

The previous prime is 135881303. The next prime is 135881311. The reversal of 135881306 is 603188531.

It can be written as a sum of positive squares in 2 ways, for example, as 128618281 + 7263025 = 11341^2 + 2695^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135881303) 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 in 11 ways as a sum of consecutive naturals, for example, 12401 + ... + 20628.

Almost surely, 2^135881306 is an apocalyptic number.

135881306 is a deficient number, since it is larger than the sum of its proper divisors (101340154).

135881306 is a wasteful number, since it uses less digits than its factorization.

135881306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33070 (or 33059 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 135881306 is about 11656.8137155914. The cubic root of 135881306 is about 514.1066688538.

The spelling of 135881306 in words is "one hundred thirty-five million, eight hundred eighty-one thousand, three hundred six".