14000021 has 4 divisors (see below), whose sum is σ = 16000032. Its totient is φ = 12000012.

The previous prime is 13999981. The next prime is 14000029. The reversal of 14000021 is 12000041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12000041 = 587 ⋅20443.

It is a cyclic number.

It is not a de Polignac number, because 14000021 - 2⁶ = 13999957 is a prime.

It is a Duffinian number.

14000021 is a modest number, since divided by 21 gives 14 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 13999972 and 14000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14000029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999995 + ... + 1000008.

It is an arithmetic number, because the mean of its divisors is an integer number (4000008).

Almost surely, 2^14000021 is an apocalyptic number.

It is an amenable number.

14000021 is a deficient number, since it is larger than the sum of its proper divisors (2000011).

14000021 is an equidigital number, since it uses as much as digits as its factorization.

14000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000010.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 14000021 is about 3741.6601930159. The cubic root of 14000021 is about 241.0143469246.

Adding to 14000021 its reverse (12000041), we get a palindrome (26000062).

The spelling of 14000021 in words is "fourteen million, twenty-one", and thus it is an aban number.