144876721 has 8 divisors (see below), whose sum is σ = 163497600. Its totient is φ = 127164240.

The previous prime is 144876709. The next prime is 144876731. The reversal of 144876721 is 127678441.

It is a happy number.

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 144876721 - 2⁵ = 144876689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144876731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226761 + ... + 227398.

It is an arithmetic number, because the mean of its divisors is an integer number (20437200).

Almost surely, 2^144876721 is an apocalyptic number.

144876721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144876721 is a deficient number, since it is larger than the sum of its proper divisors (18620879).

144876721 is a wasteful number, since it uses less digits than its factorization.

144876721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454199.

The product of its digits is 75264, while the sum is 40.

The square root of 144876721 is about 12036.4746084557. The cubic root of 144876721 is about 525.2098583546.

The spelling of 144876721 in words is "one hundred forty-four million, eight hundred seventy-six thousand, seven hundred twenty-one".