135019261 has 4 divisors (see below), whose sum is σ = 145405372. Its totient is φ = 124633152.

The previous prime is 135019207. The next prime is 135019349. The reversal of 135019261 is 162910531.

135019261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51753636 + 83265625 = 7194^2 + 9125^2 .

It is a cyclic number.

It is not a de Polignac number, because 135019261 - 2¹³ = 135011069 is a prime.

It is a super-2 number, since 2×135019261² = 36460401681972242, 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 (135019201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5193036 + ... + 5193061.

It is an arithmetic number, because the mean of its divisors is an integer number (36351343).

Almost surely, 2^135019261 is an apocalyptic number.

It is an amenable number.

135019261 is a deficient number, since it is larger than the sum of its proper divisors (10386111).

135019261 is a wasteful number, since it uses less digits than its factorization.

135019261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10386110.

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

The square root of 135019261 is about 11619.7788705293. The cubic root of 135019261 is about 513.0171797663.

Adding to 135019261 its reverse (162910531), we get a palindrome (297929792).

The spelling of 135019261 in words is "one hundred thirty-five million, nineteen thousand, two hundred sixty-one".