144406021 has 2 divisors, whose sum is σ = 144406022. Its totient is φ = 144406020.

The previous prime is 144406013. The next prime is 144406037. The reversal of 144406021 is 120604441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144360225 + 45796 = 12015^2 + 214^2 .

It is an emirp because it is prime and its reverse (120604441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144406021 - 2³ = 144406013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144405983 and 144406001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144406081) 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 as a sum of consecutive naturals, namely, 72203010 + 72203011.

It is an arithmetic number, because the mean of its divisors is an integer number (72203011).

Almost surely, 2^144406021 is an apocalyptic number.

It is an amenable number.

144406021 is a deficient number, since it is larger than the sum of its proper divisors (1).

144406021 is an equidigital number, since it uses as much as digits as its factorization.

144406021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 144406021 is about 12016.9056333151. The cubic root of 144406021 is about 524.6404443599.

The spelling of 144406021 in words is "one hundred forty-four million, four hundred six thousand, twenty-one".