14927921 has 4 divisors (see below), whose sum is σ = 15806052. Its totient is φ = 14049792.

The previous prime is 14927917. The next prime is 14927929. The reversal of 14927921 is 12972941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12972941 = 137 ⋅94693.

It can be written as a sum of positive squares in 2 ways, for example, as 13957696 + 970225 = 3736^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 14927921 - 2² = 14927917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14927929) 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 3 ways as a sum of consecutive naturals, for example, 439040 + ... + 439073.

It is an arithmetic number, because the mean of its divisors is an integer number (3951513).

Almost surely, 2^14927921 is an apocalyptic number.

It is an amenable number.

14927921 is a deficient number, since it is larger than the sum of its proper divisors (878131).

14927921 is an equidigital number, since it uses as much as digits as its factorization.

14927921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878130.

The product of its digits is 9072, while the sum is 35.

The square root of 14927921 is about 3863.6667816984. Note that the first 3 decimals coincide. The cubic root of 14927921 is about 246.2255461128.

The spelling of 14927921 in words is "fourteen million, nine hundred twenty-seven thousand, nine hundred twenty-one".