144587521 has 8 divisors (see below), whose sum is σ = 157316264. Its totient is φ = 132088320.

The previous prime is 144587501. The next prime is 144587537. The reversal of 144587521 is 125785441.

It can be written as a sum of positive squares in 4 ways, for example, as 2143296 + 142444225 = 1464^2 + 11935^2 .

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

It is not a de Polignac number, because 144587521 - 2⁵ = 144587489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144587501) 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, 56070 + ... + 58591.

It is an arithmetic number, because the mean of its divisors is an integer number (19664533).

Almost surely, 2^144587521 is an apocalyptic number.

It is an amenable number.

144587521 is a deficient number, since it is larger than the sum of its proper divisors (12728743).

144587521 is a wasteful number, since it uses less digits than its factorization.

144587521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114771.

The product of its digits is 44800, while the sum is 37.

The square root of 144587521 is about 12024.4551227904. The cubic root of 144587521 is about 524.8601544379.

It can be divided in two parts, 14458752 and 1, that added together give a triangular number (14458753 = T₅₃₇₇).

The spelling of 144587521 in words is "one hundred forty-four million, five hundred eighty-seven thousand, five hundred twenty-one".