144864247 has 8 divisors (see below), whose sum is σ = 159569280. Its totient is φ = 130415160.

The previous prime is 144864241. The next prime is 144864253. The reversal of 144864247 is 742468441.

It is an interprime number because it is at equal distance from previous prime (144864241) and next prime (144864253).

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

It is a cyclic number.

It is not a de Polignac number, because 144864247 - 2¹⁹ = 144339959 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 (144864241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62797 + ... + 65062.

It is an arithmetic number, because the mean of its divisors is an integer number (19946160).

Almost surely, 2^144864247 is an apocalyptic number.

144864247 is a deficient number, since it is larger than the sum of its proper divisors (14705033).

144864247 is a wasteful number, since it uses less digits than its factorization.

144864247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127973.

The product of its digits is 172032, while the sum is 40.

The square root of 144864247 is about 12035.9564223206. The cubic root of 144864247 is about 525.1947842608.

The spelling of 144864247 in words is "one hundred forty-four million, eight hundred sixty-four thousand, two hundred forty-seven".