135240861 has 8 divisors (see below), whose sum is σ = 206081344. Its totient is φ = 77280480.

The previous prime is 135240857. The next prime is 135240869. The reversal of 135240861 is 168042531.

135240861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 135240861 - 2² = 135240857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135240869) 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, 3220000 + ... + 3220041.

It is an arithmetic number, because the mean of its divisors is an integer number (25760168).

Almost surely, 2^135240861 is an apocalyptic number.

It is an amenable number.

135240861 is a deficient number, since it is larger than the sum of its proper divisors (70840483).

135240861 is an equidigital number, since it uses as much as digits as its factorization.

135240861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440051.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 135240861 is about 11629.3104266762. The cubic root of 135240861 is about 513.2976890507.

The spelling of 135240861 in words is "one hundred thirty-five million, two hundred forty thousand, eight hundred sixty-one".