144720447 has 8 divisors (see below), whose sum is σ = 197667120. Its totient is φ = 94127040.

The previous prime is 144720427. The next prime is 144720449. The reversal of 144720447 is 744027441.

It is a happy number.

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

It is not a de Polignac number, because 144720447 - 2²² = 140526143 is a prime.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588172 + ... + 588417.

It is an arithmetic number, because the mean of its divisors is an integer number (24708390).

Almost surely, 2^144720447 is an apocalyptic number.

144720447 is a deficient number, since it is larger than the sum of its proper divisors (52946673).

144720447 is a wasteful number, since it uses less digits than its factorization.

144720447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176633.

The product of its (nonzero) digits is 25088, while the sum is 33.

The square root of 144720447 is about 12029.9811720551. The cubic root of 144720447 is about 525.0209479170.

Adding to 144720447 its reverse (744027441), we get a palindrome (888747888).

The spelling of 144720447 in words is "one hundred forty-four million, seven hundred twenty thousand, four hundred forty-seven".