144243665 has 16 divisors (see below), whose sum is σ = 174873600. Its totient is φ = 114215232.

The previous prime is 144243599. The next prime is 144243667. The reversal of 144243665 is 566342441.

It is a cyclic number.

It is not a de Polignac number, because 144243665 - 2⁸ = 144243409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144243667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300896 + ... + 301374.

It is an arithmetic number, because the mean of its divisors is an integer number (10929600).

Almost surely, 2^144243665 is an apocalyptic number.

It is an amenable number.

144243665 is a deficient number, since it is larger than the sum of its proper divisors (30629935).

144243665 is a wasteful number, since it uses less digits than its factorization.

144243665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976.

The product of its digits is 69120, while the sum is 35.

The square root of 144243665 is about 12010.1484170680. The cubic root of 144243665 is about 524.4437525011.

The spelling of 144243665 in words is "one hundred forty-four million, two hundred forty-three thousand, six hundred sixty-five".