144042221 has 8 divisors (see below), whose sum is σ = 148092384. Its totient is φ = 140000400.

The previous prime is 144042209. The next prime is 144042233. The reversal of 144042221 is 122240441.

It is an interprime number because it is at equal distance from previous prime (144042209) and next prime (144042233).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144042221 - 2¹⁴ = 144025837 is a prime.

It is a super-2 number, since 2×144042221² = 41496322861225682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 144042193 and 144042202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144042281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52346 + ... + 55028.

It is an arithmetic number, because the mean of its divisors is an integer number (18511548).

Almost surely, 2^144042221 is an apocalyptic number.

It is an amenable number.

144042221 is a deficient number, since it is larger than the sum of its proper divisors (4050163).

144042221 is a wasteful number, since it uses less digits than its factorization.

144042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 144042221 is about 12001.7590794017. The cubic root of 144042221 is about 524.1995008371.

Adding to 144042221 its reverse (122240441), we get a palindrome (266282662).

The spelling of 144042221 in words is "one hundred forty-four million, forty-two thousand, two hundred twenty-one".