14178421 has 2 divisors, whose sum is σ = 14178422. Its totient is φ = 14178420.

The previous prime is 14178403. The next prime is 14178431. The reversal of 14178421 is 12487141.

14178421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11492100 + 2686321 = 3390^2 + 1639^2 .

It is a cyclic number.

It is not a de Polignac number, because 14178421 - 2⁹ = 14177909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 14178421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14178431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7089210 + 7089211.

It is an arithmetic number, because the mean of its divisors is an integer number (7089211).

Almost surely, 2^14178421 is an apocalyptic number.

It is an amenable number.

14178421 is a deficient number, since it is larger than the sum of its proper divisors (1).

14178421 is an equidigital number, since it uses as much as digits as its factorization.

14178421 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 14178421 is about 3765.4244116700. The cubic root of 14178421 is about 242.0337646124.

The spelling of 14178421 in words is "fourteen million, one hundred seventy-eight thousand, four hundred twenty-one".