135071261 has 8 divisors (see below), whose sum is σ = 149009784. Its totient is φ = 121639680.

The previous prime is 135071207. The next prime is 135071267. The reversal of 135071261 is 162170531.

It can be written as a sum of positive squares in 4 ways, for example, as 9765625 + 125305636 = 3125^2 + 11194^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135071261 - 2⁶ = 135071197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135071261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135071267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126176 + ... + 127241.

It is an arithmetic number, because the mean of its divisors is an integer number (18626223).

Almost surely, 2^135071261 is an apocalyptic number.

It is an amenable number.

135071261 is a deficient number, since it is larger than the sum of its proper divisors (13938523).

135071261 is a wasteful number, since it uses less digits than its factorization.

135071261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253471.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 135071261 is about 11622.0162192281. The cubic root of 135071261 is about 513.0830307893.

The spelling of 135071261 in words is "one hundred thirty-five million, seventy-one thousand, two hundred sixty-one".