144611721 has 12 divisors (see below), whose sum is σ = 208995072. Its totient is φ = 96356376.

The previous prime is 144611711. The next prime is 144611729. The reversal of 144611721 is 127116441.

144611721 is a `hidden beast` number, since 1 + 44 + 611 + 7 + 2 + 1 = 666.

It is not a de Polignac number, because 144611721 - 2⁵ = 144611689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144611729) 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 11 ways as a sum of consecutive naturals, for example, 22000 + ... + 27806.

It is an arithmetic number, because the mean of its divisors is an integer number (17416256).

Almost surely, 2^144611721 is an apocalyptic number.

It is an amenable number.

144611721 is a deficient number, since it is larger than the sum of its proper divisors (64383351).

144611721 is a wasteful number, since it uses less digits than its factorization.

144611721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8580 (or 8577 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 144611721 is about 12025.4613632908. The cubic root of 144611721 is about 524.8894352201.

The spelling of 144611721 in words is "one hundred forty-four million, six hundred eleven thousand, seven hundred twenty-one".