135954721 has 8 divisors (see below), whose sum is σ = 155514240. Its totient is φ = 116429568.

The previous prime is 135954713. The next prime is 135954727. The reversal of 135954721 is 127459531.

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 135954721 - 2³ = 135954713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135954727) 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, 540 + ... + 16498.

It is an arithmetic number, because the mean of its divisors is an integer number (19439280).

Almost surely, 2^135954721 is an apocalyptic number.

It is an amenable number.

135954721 is a deficient number, since it is larger than the sum of its proper divisors (19559519).

135954721 is a wasteful number, since it uses less digits than its factorization.

135954721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17183.

The product of its digits is 37800, while the sum is 37.

The square root of 135954721 is about 11659.9623069717. The cubic root of 135954721 is about 514.1992406894.

The spelling of 135954721 in words is "one hundred thirty-five million, nine hundred fifty-four thousand, seven hundred twenty-one".