14781421 has 2 divisors, whose sum is σ = 14781422. Its totient is φ = 14781420.

The previous prime is 14781413. The next prime is 14781439. The reversal of 14781421 is 12418741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8094025 + 6687396 = 2845^2 + 2586^2 .

It is a cyclic number.

It is not a de Polignac number, because 14781421 - 2³ = 14781413 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 14781421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14781401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7390710 + 7390711.

It is an arithmetic number, because the mean of its divisors is an integer number (7390711).

Almost surely, 2^14781421 is an apocalyptic number.

It is an amenable number.

14781421 is a deficient number, since it is larger than the sum of its proper divisors (1).

14781421 is an equidigital number, since it uses as much as digits as its factorization.

14781421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 28.

The square root of 14781421 is about 3844.6613635013. The cubic root of 14781421 is about 245.4174252840.

The spelling of 14781421 in words is "fourteen million, seven hundred eighty-one thousand, four hundred twenty-one".