144344561 has 4 divisors (see below), whose sum is σ = 145966500. Its totient is φ = 142722624.

The previous prime is 144344549. The next prime is 144344591. The reversal of 144344561 is 165443441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165443441 = 103 ⋅1606247.

It can be written as a sum of positive squares in 2 ways, for example, as 74304400 + 70040161 = 8620^2 + 8369^2 .

It is a cyclic number.

It is not a de Polignac number, because 144344561 - 2¹⁸ = 144082417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144344521) 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 in 3 ways as a sum of consecutive naturals, for example, 810836 + ... + 811013.

It is an arithmetic number, because the mean of its divisors is an integer number (36491625).

Almost surely, 2^144344561 is an apocalyptic number.

It is an amenable number.

144344561 is a deficient number, since it is larger than the sum of its proper divisors (1621939).

144344561 is an equidigital number, since it uses as much as digits as its factorization.

144344561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621938.

The product of its digits is 23040, while the sum is 32.

The square root of 144344561 is about 12014.3481304647. The cubic root of 144344561 is about 524.5660038413.

The spelling of 144344561 in words is "one hundred forty-four million, three hundred forty-four thousand, five hundred sixty-one".