144240442 has 8 divisors (see below), whose sum is σ = 216440532. Its totient is φ = 72093600.

The previous prime is 144240379. The next prime is 144240443. The reversal of 144240442 is 244042441.

It can be written as a sum of positive squares in 2 ways, for example, as 141871921 + 2368521 = 11911^2 + 1539^2 .

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

It is not an unprimeable number, because it can be changed into a prime (144240443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5659 + ... + 17902.

Almost surely, 2^144240442 is an apocalyptic number.

144240442 is a deficient number, since it is larger than the sum of its proper divisors (72200090).

144240442 is a wasteful number, since it uses less digits than its factorization.

144240442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26624.

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 144240442 is about 12010.0142381264. The cubic root of 144240442 is about 524.4398463912.

Adding to 144240442 its reverse (244042441), we get a palindrome (388282883).

The spelling of 144240442 in words is "one hundred forty-four million, two hundred forty thousand, four hundred forty-two".