144001221 has 32 divisors (see below), whose sum is σ = 237753600. Its totient is φ = 75492864.

The previous prime is 144001217. The next prime is 144001243. The reversal of 144001221 is 122100441.

It is not a de Polignac number, because 144001221 - 2² = 144001217 is a prime.

144001221 is a modest number, since divided by 1221 gives 144 as remainder.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 144001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144001201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45705 + ... + 48753.

It is an arithmetic number, because the mean of its divisors is an integer number (7429800).

Almost surely, 2^144001221 is an apocalyptic number.

It is an amenable number.

144001221 is a deficient number, since it is larger than the sum of its proper divisors (93752379).

144001221 is a wasteful number, since it uses less digits than its factorization.

144001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3245.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 144001221 is about 12000.0508748922. The cubic root of 144001221 is about 524.1497602845.

Adding to 144001221 its reverse (122100441), we get a palindrome (266101662).

The spelling of 144001221 in words is "one hundred forty-four million, one thousand, two hundred twenty-one".