135839261 has 4 divisors (see below), whose sum is σ = 136018524. Its totient is φ = 135660000.

The previous prime is 135839257. The next prime is 135839267. The reversal of 135839261 is 162938531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19307236 + 116532025 = 4394^2 + 10795^2 .

It is a cyclic number.

It is not a de Polignac number, because 135839261 - 2² = 135839257 is a prime.

It is a super-2 number, since 2×135839261² = 36904609658052242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135839267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88490 + ... + 90011.

It is an arithmetic number, because the mean of its divisors is an integer number (34004631).

Almost surely, 2^135839261 is an apocalyptic number.

It is an amenable number.

135839261 is a deficient number, since it is larger than the sum of its proper divisors (179263).

135839261 is an equidigital number, since it uses as much as digits as its factorization.

135839261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179262.

The product of its digits is 38880, while the sum is 38.

The square root of 135839261 is about 11655.0101244057. The cubic root of 135839261 is about 514.0536376573.

The spelling of 135839261 in words is "one hundred thirty-five million, eight hundred thirty-nine thousand, two hundred sixty-one".