14270021 has 4 divisors (see below), whose sum is σ = 15109452. Its totient is φ = 13430592.

The previous prime is 14270017. The next prime is 14270029. The reversal of 14270021 is 12007241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12007241 = 347 ⋅34603.

It can be written as a sum of positive squares in 2 ways, for example, as 10329796 + 3940225 = 3214^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 14270021 - 2² = 14270017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 839413 = 14270021 / (1 + 4 + 2 + 7 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14270029) 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, 419690 + ... + 419723.

It is an arithmetic number, because the mean of its divisors is an integer number (3777363).

Almost surely, 2^14270021 is an apocalyptic number.

It is an amenable number.

14270021 is a deficient number, since it is larger than the sum of its proper divisors (839431).

14270021 is an equidigital number, since it uses as much as digits as its factorization.

14270021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839430.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 14270021 is about 3777.5681330719. The cubic root of 14270021 is about 242.5538676520.

Adding to 14270021 its reverse (12007241), we get a palindrome (26277262).

The spelling of 14270021 in words is "fourteen million, two hundred seventy thousand, twenty-one".