144420503 has 4 divisors (see below), whose sum is σ = 145153800. Its totient is φ = 143687208.

The previous prime is 144420481. The next prime is 144420511. The reversal of 144420503 is 305024441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305024441 = 73 ⋅4178417.

It is a cyclic number.

It is not a de Polignac number, because 144420503 - 2⁶ = 144420439 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 (144420533) 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, 366353 + ... + 366746.

It is an arithmetic number, because the mean of its divisors is an integer number (36288450).

Almost surely, 2^144420503 is an apocalyptic number.

144420503 is a deficient number, since it is larger than the sum of its proper divisors (733297).

144420503 is an equidigital number, since it uses as much as digits as its factorization.

144420503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733296.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 144420503 is about 12017.5081859760. The cubic root of 144420503 is about 524.6579819226.

Adding to 144420503 its reverse (305024441), we get a palindrome (449444944).

The spelling of 144420503 in words is "one hundred forty-four million, four hundred twenty thousand, five hundred three".