14138721 has 24 divisors (see below), whose sum is σ = 21490560. Its totient is φ = 8940096.

The previous prime is 14138711. The next prime is 14138723. The reversal of 14138721 is 12783141.

It is not a de Polignac number, because 14138721 - 2²³ = 5750113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (14138723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34365 + ... + 34773.

It is an arithmetic number, because the mean of its divisors is an integer number (895440).

Almost surely, 2^14138721 is an apocalyptic number.

It is an amenable number.

14138721 is a deficient number, since it is larger than the sum of its proper divisors (7351839).

14138721 is a wasteful number, since it uses less digits than its factorization.

14138721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 602 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 14138721 is about 3760.1490661941. The cubic root of 14138721 is about 241.8076528640.

The spelling of 14138721 in words is "fourteen million, one hundred thirty-eight thousand, seven hundred twenty-one".