144442 has 4 divisors (see below), whose sum is σ = 216666. Its totient is φ = 72220.

The previous prime is 144439. The next prime is 144451. The reversal of 144442 is 244441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244441 = 29 ⋅8429.

It can be written as a sum of positive squares in only one way, i.e., 136161 + 8281 = 369^2 + 91^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36109 + ... + 36112.

2¹⁴⁴⁴⁴² is an apocalyptic number.

144442 is a deficient number, since it is larger than the sum of its proper divisors (72224).

144442 is an equidigital number, since it uses as much as digits as its factorization.

144442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72223.

The product of its digits is 512, while the sum is 19.

The square root of 144442 is about 380.0552591400. The cubic root of 144442 is about 52.4684012421.

Adding to 144442 its reverse (244441), we get a palindrome (388883).

Subtracting 144442 from its reverse (244441), we obtain a palindrome (99999).

The spelling of 144442 in words is "one hundred forty-four thousand, four hundred forty-two", and thus it is an iban number.