144221242 has 16 divisors (see below), whose sum is σ = 236198592. Its totient is φ = 65499520.

The previous prime is 144221237. The next prime is 144221291. The reversal of 144221242 is 242122441.

It is a super-3 number, since 3×144221242³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 35403 + ... + 39265.

It is an arithmetic number, because the mean of its divisors is an integer number (14762412).

Almost surely, 2^144221242 is an apocalyptic number.

144221242 is a deficient number, since it is larger than the sum of its proper divisors (91977350).

144221242 is a wasteful number, since it uses less digits than its factorization.

144221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5573.

The product of its digits is 1024, while the sum is 22.

The square root of 144221242 is about 12009.2148785839. The cubic root of 144221242 is about 524.4165757751.

Adding to 144221242 its reverse (242122441), we get a palindrome (386343683).

The spelling of 144221242 in words is "one hundred forty-four million, two hundred twenty-one thousand, two hundred forty-two".