144421455 has 16 divisors (see below), whose sum is σ = 234330624. Its totient is φ = 75939360.

The previous prime is 144421447. The next prime is 144421463. The reversal of 144421455 is 554124441.

It is an interprime number because it is at equal distance from previous prime (144421447) and next prime (144421463).

It is not a de Polignac number, because 144421455 - 2³ = 144421447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66739 + ... + 68868.

It is an arithmetic number, because the mean of its divisors is an integer number (14645664).

Almost surely, 2^144421455 is an apocalyptic number.

144421455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

144421455 is a deficient number, since it is larger than the sum of its proper divisors (89909169).

144421455 is a wasteful number, since it uses less digits than its factorization.

144421455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135686.

The product of its digits is 12800, while the sum is 30.

The square root of 144421455 is about 12017.5477947874. The cubic root of 144421455 is about 524.6591347444.

Adding to 144421455 its reverse (554124441), we get a palindrome (698545896).

The spelling of 144421455 in words is "one hundred forty-four million, four hundred twenty-one thousand, four hundred fifty-five".