144720439 has 16 divisors (see below), whose sum is σ = 160496640. Its totient is φ = 129796480.

The previous prime is 144720427. The next prime is 144720449. The reversal of 144720439 is 934027441.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 144720439 - 2⁷ = 144720311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144720449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139854 + ... + 140884.

It is an arithmetic number, because the mean of its divisors is an integer number (10031040).

Almost surely, 2^144720439 is an apocalyptic number.

144720439 is a deficient number, since it is larger than the sum of its proper divisors (15776201).

144720439 is a wasteful number, since it uses less digits than its factorization.

144720439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 144720439 is about 12029.9808395525. The cubic root of 144720439 is about 525.0209382428.

The spelling of 144720439 in words is "one hundred forty-four million, seven hundred twenty thousand, four hundred thirty-nine".