14278991 has 8 divisors (see below), whose sum is σ = 14891520. Its totient is φ = 13674528.

The previous prime is 14278961. The next prime is 14279011. The reversal of 14278991 is 19987241.

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 14278991 - 2¹⁴ = 14262607 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 (14278921) 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, 1745 + ... + 5621.

It is an arithmetic number, because the mean of its divisors is an integer number (1861440).

Almost surely, 2^14278991 is an apocalyptic number.

14278991 is a deficient number, since it is larger than the sum of its proper divisors (612529).

14278991 is a wasteful number, since it uses less digits than its factorization.

14278991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033.

The product of its digits is 36288, while the sum is 41.

The square root of 14278991 is about 3778.7552183226. The cubic root of 14278991 is about 242.6046793613.

The spelling of 14278991 in words is "fourteen million, two hundred seventy-eight thousand, nine hundred ninety-one".