135940641 has 4 divisors (see below), whose sum is σ = 181254192. Its totient is φ = 90627092.

The previous prime is 135940639. The next prime is 135940643. The reversal of 135940641 is 146049531.

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.

It is an interprime number because it is at equal distance from previous prime (135940639) and next prime (135940643).

It is a cyclic number.

It is not a de Polignac number, because 135940641 - 2¹ = 135940639 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135940643) 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, 22656771 + ... + 22656776.

It is an arithmetic number, because the mean of its divisors is an integer number (45313548).

Almost surely, 2^135940641 is an apocalyptic number.

It is an amenable number.

135940641 is a deficient number, since it is larger than the sum of its proper divisors (45313551).

135940641 is an equidigital number, since it uses as much as digits as its factorization.

135940641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45313550.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 135940641 is about 11659.3585158018. The cubic root of 135940641 is about 514.1814892518.

The spelling of 135940641 in words is "one hundred thirty-five million, nine hundred forty thousand, six hundred forty-one".