135013261 has 4 divisors (see below), whose sum is σ = 135573724. Its totient is φ = 134452800.

The previous prime is 135013253. The next prime is 135013271. The reversal of 135013261 is 162310531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162310531 = 1277 ⋅127103.

It can be written as a sum of positive squares in 2 ways, for example, as 102637161 + 32376100 = 10131^2 + 5690^2 .

It is a cyclic number.

It is not a de Polignac number, because 135013261 - 2³ = 135013253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135013271) 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, 279870 + ... + 280351.

It is an arithmetic number, because the mean of its divisors is an integer number (33893431).

Almost surely, 2^135013261 is an apocalyptic number.

It is an amenable number.

135013261 is a deficient number, since it is larger than the sum of its proper divisors (560463).

135013261 is an equidigital number, since it uses as much as digits as its factorization.

135013261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560462.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 135013261 is about 11619.5206871884. The cubic root of 135013261 is about 513.0095804834.

Adding to 135013261 its reverse (162310531), we get a palindrome (297323792).

The spelling of 135013261 in words is "one hundred thirty-five million, thirteen thousand, two hundred sixty-one".