14220991 has 8 divisors (see below), whose sum is σ = 14954400. Its totient is φ = 13503840.

The previous prime is 14220977. The next prime is 14221021. The reversal of 14220991 is 19902241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 14220991 - 2⁷ = 14220863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14220191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251 + ... + 5788.

It is an arithmetic number, because the mean of its divisors is an integer number (1869300).

Almost surely, 2^14220991 is an apocalyptic number.

14220991 is a deficient number, since it is larger than the sum of its proper divisors (733409).

14220991 is an equidigital number, since it uses as much as digits as its factorization.

14220991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8129.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 14220991 is about 3771.0729242485. The cubic root of 14220991 is about 242.2757540115.

The spelling of 14220991 in words is "fourteen million, two hundred twenty thousand, nine hundred ninety-one".