144287591 has 4 divisors (see below), whose sum is σ = 164900112. Its totient is φ = 123675072.

The previous prime is 144287587. The next prime is 144287593. The reversal of 144287591 is 195782441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144287591 - 2² = 144287587 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 (144287593) 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, 10306250 + ... + 10306263.

It is an arithmetic number, because the mean of its divisors is an integer number (41225028).

Almost surely, 2^144287591 is an apocalyptic number.

144287591 is a deficient number, since it is larger than the sum of its proper divisors (20612521).

144287591 is an equidigital number, since it uses as much as digits as its factorization.

144287591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20612520.

The product of its digits is 80640, while the sum is 41.

The square root of 144287591 is about 12011.9769813299. The cubic root of 144287591 is about 524.4969827492.

The spelling of 144287591 in words is "one hundred forty-four million, two hundred eighty-seven thousand, five hundred ninety-one".