144256421 has 2 divisors, whose sum is σ = 144256422. Its totient is φ = 144256420.

The previous prime is 144256403. The next prime is 144256439. The reversal of 144256421 is 124652441.

It is a balanced prime because it is at equal distance from previous prime (144256403) and next prime (144256439).

It can be written as a sum of positive squares in only one way, i.e., 82555396 + 61701025 = 9086^2 + 7855^2 .

It is a cyclic number.

It is not a de Polignac number, because 144256421 - 2²⁶ = 77147557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144256471) 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, 72128210 + 72128211.

It is an arithmetic number, because the mean of its divisors is an integer number (72128211).

Almost surely, 2^144256421 is an apocalyptic number.

It is an amenable number.

144256421 is a deficient number, since it is larger than the sum of its proper divisors (1).

144256421 is an equidigital number, since it uses as much as digits as its factorization.

144256421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 29.

The square root of 144256421 is about 12010.6794562173. The cubic root of 144256421 is about 524.4592115447.

The spelling of 144256421 in words is "one hundred forty-four million, two hundred fifty-six thousand, four hundred twenty-one".