14730021 has 6 divisors (see below), whose sum is σ = 21276710. Its totient is φ = 9820008.

The previous prime is 14730011. The next prime is 14730031. The reversal of 14730021 is 12003741.

It is an interprime number because it is at equal distance from previous prime (14730011) and next prime (14730031).

It can be written as a sum of positive squares in only one way, i.e., 9828225 + 4901796 = 3135^2 + 2214^2 .

It is not a de Polignac number, because 14730021 - 2¹⁴ = 14713637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 14729976 and 14730003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14730011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 818326 + ... + 818343.

Almost surely, 2^14730021 is an apocalyptic number.

It is an amenable number.

14730021 is a deficient number, since it is larger than the sum of its proper divisors (6546689).

14730021 is a wasteful number, since it uses less digits than its factorization.

14730021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636675 (or 1636672 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 14730021 is about 3837.9709483007. The cubic root of 14730021 is about 245.1326284537.

Adding to 14730021 its reverse (12003741), we get a palindrome (26733762).

The spelling of 14730021 in words is "fourteen million, seven hundred thirty thousand, twenty-one".