144442291 has 4 divisors (see below), whose sum is σ = 165076912. Its totient is φ = 123807672.

The previous prime is 144442273. The next prime is 144442297. The reversal of 144442291 is 192244441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192244441 = 1451 ⋅132491.

It is a cyclic number.

It is not a de Polignac number, because 144442291 - 2¹¹ = 144440243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144442297) 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, 10317300 + ... + 10317313.

It is an arithmetic number, because the mean of its divisors is an integer number (41269228).

Almost surely, 2^144442291 is an apocalyptic number.

144442291 is a deficient number, since it is larger than the sum of its proper divisors (20634621).

144442291 is an equidigital number, since it uses as much as digits as its factorization.

144442291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20634620.

The product of its digits is 9216, while the sum is 31.

The square root of 144442291 is about 12018.4146625085. The cubic root of 144442291 is about 524.6843647723.

The spelling of 144442291 in words is "one hundred forty-four million, four hundred forty-two thousand, two hundred ninety-one".