14821381 has 2 divisors, whose sum is σ = 14821382. Its totient is φ = 14821380.

The previous prime is 14821357. The next prime is 14821421. The reversal of 14821381 is 18312841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12744900 + 2076481 = 3570^2 + 1441^2 .

It is an emirp because it is prime and its reverse (18312841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14821381 - 2⁷ = 14821253 is a prime.

It is a super-2 number, since 2×14821381² = 439346669494322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14821351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7410690 + 7410691.

It is an arithmetic number, because the mean of its divisors is an integer number (7410691).

Almost surely, 2^14821381 is an apocalyptic number.

It is an amenable number.

14821381 is a deficient number, since it is larger than the sum of its proper divisors (1).

14821381 is an equidigital number, since it uses as much as digits as its factorization.

14821381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 28.

The square root of 14821381 is about 3849.8546725818. The cubic root of 14821381 is about 245.6383795995.

The spelling of 14821381 in words is "fourteen million, eight hundred twenty-one thousand, three hundred eighty-one".