144421505 has 8 divisors (see below), whose sum is σ = 173372712. Its totient is φ = 115492608.

The previous prime is 144421499. The next prime is 144421507. The reversal of 144421505 is 505124441.

It can be written as a sum of positive squares in 4 ways, for example, as 54228496 + 90193009 = 7364^2 + 9497^2 .

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 144421505 - 2⁶ = 144421441 is a prime.

It is a super-2 number, since 2×144421505² = 41715142212930050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144421507) 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, 16937 + ... + 23993.

It is an arithmetic number, because the mean of its divisors is an integer number (21671589).

Almost surely, 2^144421505 is an apocalyptic number.

It is an amenable number.

144421505 is a deficient number, since it is larger than the sum of its proper divisors (28951207).

144421505 is an equidigital number, since it uses as much as digits as its factorization.

144421505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11155.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 144421505 is about 12017.5498750785. The cubic root of 144421505 is about 524.6591952916.

Adding to 144421505 its reverse (505124441), we get a palindrome (649545946).

The spelling of 144421505 in words is "one hundred forty-four million, four hundred twenty-one thousand, five hundred five".