144445621 has 8 divisors (see below), whose sum is σ = 147070944. Its totient is φ = 141828720.

The previous prime is 144445597. The next prime is 144445633. The reversal of 144445621 is 126544441.

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 144445621 - 2¹⁷ = 144314549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144445121) 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, 39930 + ... + 43396.

It is an arithmetic number, because the mean of its divisors is an integer number (18383868).

Almost surely, 2^144445621 is an apocalyptic number.

It is an amenable number.

144445621 is a deficient number, since it is larger than the sum of its proper divisors (2625323).

144445621 is an equidigital number, since it uses as much as digits as its factorization.

144445621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4211.

The product of its digits is 15360, while the sum is 31.

The square root of 144445621 is about 12018.5531991168. The cubic root of 144445621 is about 524.6883967990.

The spelling of 144445621 in words is "one hundred forty-four million, four hundred forty-five thousand, six hundred twenty-one".