144261621 has 32 divisors (see below), whose sum is σ = 244945920. Its totient is φ = 82201392.

The previous prime is 144261619. The next prime is 144261641. The reversal of 144261621 is 126162441.

144261621 is a `hidden beast` number, since 1 + 4 + 42 + 616 + 2 + 1 = 666.

It is not a de Polignac number, because 144261621 - 2¹ = 144261619 is a prime.

It is a super-2 number, since 2×144261621² = 41622830587095282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144261641) 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 31 ways as a sum of consecutive naturals, for example, 82866 + ... + 84588.

It is an arithmetic number, because the mean of its divisors is an integer number (7654560).

Almost surely, 2^144261621 is an apocalyptic number.

It is an amenable number.

144261621 is a deficient number, since it is larger than the sum of its proper divisors (100684299).

144261621 is a wasteful number, since it uses less digits than its factorization.

144261621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182 (or 2176 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 144261621 is about 12010.8959282811. The cubic root of 144261621 is about 524.4655131825.

The spelling of 144261621 in words is "one hundred forty-four million, two hundred sixty-one thousand, six hundred twenty-one".