144303021 has 12 divisors (see below), whose sum is σ = 220698972. Its totient is φ = 90542976.

The previous prime is 144303013. The next prime is 144303023. The reversal of 144303021 is 120303441.

It can be written as a sum of positive squares in 2 ways, for example, as 101727396 + 42575625 = 10086^2 + 6525^2 .

It is not a de Polignac number, because 144303021 - 2³ = 144303013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144302985 and 144303003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144303023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 471426 + ... + 471731.

It is an arithmetic number, because the mean of its divisors is an integer number (18391581).

Almost surely, 2^144303021 is an apocalyptic number.

It is an amenable number.

144303021 is a deficient number, since it is larger than the sum of its proper divisors (76395951).

144303021 is a wasteful number, since it uses less digits than its factorization.

144303021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943180 (or 943177 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 144303021 is about 12012.6192397828. The cubic root of 144303021 is about 524.5156785126.

Adding to 144303021 its reverse (120303441), we get a palindrome (264606462).

The spelling of 144303021 in words is "one hundred forty-four million, three hundred three thousand, twenty-one".