135750261 has 4 divisors (see below), whose sum is σ = 181000352. Its totient is φ = 90500172.

The previous prime is 135750259. The next prime is 135750281. The reversal of 135750261 is 162057531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162057531 = 3 ⋅54019177.

It is not a de Polignac number, because 135750261 - 2¹ = 135750259 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 (135750281) 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, 22625041 + ... + 22625046.

It is an arithmetic number, because the mean of its divisors is an integer number (45250088).

Almost surely, 2^135750261 is an apocalyptic number.

It is an amenable number.

135750261 is a deficient number, since it is larger than the sum of its proper divisors (45250091).

135750261 is an equidigital number, since it uses as much as digits as its factorization.

135750261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45250090.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 135750261 is about 11651.1913983077. The cubic root of 135750261 is about 513.9413461916.

The spelling of 135750261 in words is "one hundred thirty-five million, seven hundred fifty thousand, two hundred sixty-one".