14428781 has 2 divisors, whose sum is σ = 14428782. Its totient is φ = 14428780.

The previous prime is 14428763. The next prime is 14428783. The reversal of 14428781 is 18782441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12075625 + 2353156 = 3475^2 + 1534^2 .

It is an emirp because it is prime and its reverse (18782441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14428781 - 2⁶ = 14428717 is a prime.

It is a super-2 number, since 2×14428781² = 416379442291922, which contains 22 as substring.

Together with 14428783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14428783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7214390 + 7214391.

It is an arithmetic number, because the mean of its divisors is an integer number (7214391).

Almost surely, 2^14428781 is an apocalyptic number.

It is an amenable number.

14428781 is a deficient number, since it is larger than the sum of its proper divisors (1).

14428781 is an equidigital number, since it uses as much as digits as its factorization.

14428781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14336, while the sum is 35.

The square root of 14428781 is about 3798.5235289517. The cubic root of 14428781 is about 243.4500570088.

The spelling of 14428781 in words is "fourteen million, four hundred twenty-eight thousand, seven hundred eighty-one".