144212561 has 2 divisors, whose sum is σ = 144212562. Its totient is φ = 144212560.

The previous prime is 144212557. The next prime is 144212587. The reversal of 144212561 is 165212441.

It is an a-pointer prime, because the next prime (144212587) can be obtained adding 144212561 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122766400 + 21446161 = 11080^2 + 4631^2 .

It is a cyclic number.

It is not a de Polignac number, because 144212561 - 2² = 144212557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144212561.

It is not a weakly prime, because it can be changed into another prime (144212501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72106280 + 72106281.

It is an arithmetic number, because the mean of its divisors is an integer number (72106281).

Almost surely, 2^144212561 is an apocalyptic number.

It is an amenable number.

144212561 is a deficient number, since it is larger than the sum of its proper divisors (1).

144212561 is an equidigital number, since it uses as much as digits as its factorization.

144212561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 144212561 is about 12008.8534423566. The cubic root of 144212561 is about 524.4060536274.

The spelling of 144212561 in words is "one hundred forty-four million, two hundred twelve thousand, five hundred sixty-one".