144222721 has 2 divisors, whose sum is σ = 144222722. Its totient is φ = 144222720.

The previous prime is 144222697. The next prime is 144222737. The reversal of 144222721 is 127222441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102232321 + 41990400 = 10111^2 + 6480^2 .

It is a cyclic number.

It is not a de Polignac number, because 144222721 - 2²⁵ = 110668289 is a prime.

It is not a weakly prime, because it can be changed into another prime (144222751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72111360 + 72111361.

It is an arithmetic number, because the mean of its divisors is an integer number (72111361).

Almost surely, 2^144222721 is an apocalyptic number.

It is an amenable number.

144222721 is a deficient number, since it is larger than the sum of its proper divisors (1).

144222721 is an equidigital number, since it uses as much as digits as its factorization.

144222721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 25.

The square root of 144222721 is about 12009.2764561401. The cubic root of 144222721 is about 524.4183684132.

The spelling of 144222721 in words is "one hundred forty-four million, two hundred twenty-two thousand, seven hundred twenty-one".