135461721 has 8 divisors (see below), whose sum is σ = 180810144. Its totient is φ = 90210560.

The previous prime is 135461701. The next prime is 135461749. The reversal of 135461721 is 127164531.

135461721 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 a cyclic number.

It is not a de Polignac number, because 135461721 - 2¹⁰ = 135460697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135461701) 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, 21000 + ... + 26681.

It is an arithmetic number, because the mean of its divisors is an integer number (22601268).

Almost surely, 2^135461721 is an apocalyptic number.

It is an amenable number.

135461721 is a deficient number, since it is larger than the sum of its proper divisors (45348423).

135461721 is an equidigital number, since it uses as much as digits as its factorization.

135461721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48631.

The product of its digits is 5040, while the sum is 30.

The square root of 135461721 is about 11638.8023868438. The cubic root of 135461721 is about 513.5769568943.

The spelling of 135461721 in words is "one hundred thirty-five million, four hundred sixty-one thousand, seven hundred twenty-one".