14021591 has 2 divisors, whose sum is σ = 14021592. Its totient is φ = 14021590.

The previous prime is 14021573. The next prime is 14021593. The reversal of 14021591 is 19512041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 14021591 - 2¹⁴ = 14005207 is a prime.

Together with 14021593, 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 (14021593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7010795 + 7010796.

It is an arithmetic number, because the mean of its divisors is an integer number (7010796).

Almost surely, 2^14021591 is an apocalyptic number.

14021591 is a deficient number, since it is larger than the sum of its proper divisors (1).

14021591 is an equidigital number, since it uses as much as digits as its factorization.

14021591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 14021591 is about 3744.5414939616. The cubic root of 14021591 is about 241.1380613070.

The spelling of 14021591 in words is "fourteen million, twenty-one thousand, five hundred ninety-one".