144402247 has 24 divisors (see below), whose sum is σ = 165626496. Its totient is φ = 125664000.

The previous prime is 144402241. The next prime is 144402277. The reversal of 144402247 is 742204441.

It is not a de Polignac number, because 144402247 - 2³ = 144402239 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144402241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 513747 + ... + 514027.

It is an arithmetic number, because the mean of its divisors is an integer number (6901104).

Almost surely, 2^144402247 is an apocalyptic number.

144402247 is a deficient number, since it is larger than the sum of its proper divisors (21224249).

144402247 is a wasteful number, since it uses less digits than its factorization.

144402247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 28.

The square root of 144402247 is about 12016.7486035117. The cubic root of 144402247 is about 524.6358738896.

Adding to 144402247 its reverse (742204441), we get a palindrome (886606688).

The spelling of 144402247 in words is "one hundred forty-four million, four hundred two thousand, two hundred forty-seven".