144452621 has 4 divisors (see below), whose sum is σ = 152949852. Its totient is φ = 135955392.

The previous prime is 144452617. The next prime is 144452639. The reversal of 144452621 is 126254441.

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 116942596 + 27510025 = 10814^2 + 5245^2 .

It is not a de Polignac number, because 144452621 - 2² = 144452617 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 (144452641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4248590 + ... + 4248623.

It is an arithmetic number, because the mean of its divisors is an integer number (38237463).

Almost surely, 2^144452621 is an apocalyptic number.

It is an amenable number.

144452621 is a deficient number, since it is larger than the sum of its proper divisors (8497231).

144452621 is an equidigital number, since it uses as much as digits as its factorization.

144452621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8497230.

The product of its digits is 7680, while the sum is 29.

The square root of 144452621 is about 12018.8444120057. The cubic root of 144452621 is about 524.6968723287.

The spelling of 144452621 in words is "one hundred forty-four million, four hundred fifty-two thousand, six hundred twenty-one".