14040021 has 4 divisors (see below), whose sum is σ = 18720032. Its totient is φ = 9360012.

The previous prime is 14040001. The next prime is 14040023. The reversal of 14040021 is 12004041.

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.

It is not a de Polignac number, because 14040021 - 2¹⁴ = 14023637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 14039979 and 14040006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14040023) 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, 2340001 + ... + 2340006.

It is an arithmetic number, because the mean of its divisors is an integer number (4680008).

Almost surely, 2^14040021 is an apocalyptic number.

It is an amenable number.

14040021 is a deficient number, since it is larger than the sum of its proper divisors (4680011).

14040021 is an equidigital number, since it uses as much as digits as its factorization.

14040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680010.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 14040021 is about 3747.0016012807. The cubic root of 14040021 is about 241.2436657934.

Subtracting from 14040021 its sum of digits (12), we obtain a square (14040009 = 3747²).

Adding to 14040021 its reverse (12004041), we get a palindrome (26044062).

The spelling of 14040021 in words is "fourteen million, forty thousand, twenty-one".