14158991 has 24 divisors (see below), whose sum is σ = 18208080. Its totient is φ = 10886400.

The previous prime is 14158987. The next prime is 14159017. The reversal of 14158991 is 19985141.

It is not a de Polignac number, because 14158991 - 2² = 14158987 is a prime.

It is a super-2 number, since 2×14158991² = 400954052276162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14158091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58631 + ... + 58871.

It is an arithmetic number, because the mean of its divisors is an integer number (758670).

Almost surely, 2^14158991 is an apocalyptic number.

14158991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

14158991 is a deficient number, since it is larger than the sum of its proper divisors (4049089).

14158991 is a wasteful number, since it uses less digits than its factorization.

14158991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 368 counting only the distinct ones).

The product of its digits is 12960, while the sum is 38.

The square root of 14158991 is about 3762.8434726946. The cubic root of 14158991 is about 241.9231536619.

The spelling of 14158991 in words is "fourteen million, one hundred fifty-eight thousand, nine hundred ninety-one".