144563965 has 24 divisors (see below), whose sum is σ = 217327320. Its totient is φ = 91502208.

The previous prime is 144563959. The next prime is 144563981. The reversal of 144563965 is 569365441.

It can be written as a sum of positive squares in 4 ways, for example, as 8398404 + 136165561 = 2898^2 + 11669^2 .

It is not a de Polignac number, because 144563965 - 2⁵ = 144563933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19510 + ... + 25879.

It is an arithmetic number, because the mean of its divisors is an integer number (9055305).

Almost surely, 2^144563965 is an apocalyptic number.

It is an amenable number.

144563965 is a deficient number, since it is larger than the sum of its proper divisors (72763355).

144563965 is a wasteful number, since it uses less digits than its factorization.

144563965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45421 (or 45414 counting only the distinct ones).

The product of its digits is 388800, while the sum is 43.

The square root of 144563965 is about 12023.4755790495. The cubic root of 144563965 is about 524.8316497251.

The spelling of 144563965 in words is "one hundred forty-four million, five hundred sixty-three thousand, nine hundred sixty-five".