144002521 has 4 divisors (see below), whose sum is σ = 155079652. Its totient is φ = 132925392.

The previous prime is 144002489. The next prime is 144002527. The reversal of 144002521 is 125200441.

144002521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 69956496 + 74046025 = 8364^2 + 8605^2 .

It is a cyclic number.

It is not a de Polignac number, because 144002521 - 2⁵ = 144002489 is a prime.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (144002527) 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, 5538546 + ... + 5538571.

It is an arithmetic number, because the mean of its divisors is an integer number (38769913).

Almost surely, 2^144002521 is an apocalyptic number.

It is an amenable number.

144002521 is a deficient number, since it is larger than the sum of its proper divisors (11077131).

144002521 is a wasteful number, since it uses less digits than its factorization.

144002521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11077130.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 144002521 is about 12000.1050412069. The cubic root of 144002521 is about 524.1513375689.

Adding to 144002521 its reverse (125200441), we get a palindrome (269202962).

The spelling of 144002521 in words is "one hundred forty-four million, two thousand, five hundred twenty-one".