14218921 has 4 divisors (see below), whose sum is σ = 14314500. Its totient is φ = 14123344.

The previous prime is 14218891. The next prime is 14218927. The reversal of 14218921 is 12981241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6579225 + 7639696 = 2565^2 + 2764^2 .

It is a cyclic number.

It is not a de Polignac number, because 14218921 - 2¹⁹ = 13694633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14218921.

It is not an unprimeable number, because it can be changed into a prime (14218927) 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, 47566 + ... + 47863.

It is an arithmetic number, because the mean of its divisors is an integer number (3578625).

Almost surely, 2^14218921 is an apocalyptic number.

It is an amenable number.

14218921 is a deficient number, since it is larger than the sum of its proper divisors (95579).

14218921 is an equidigital number, since it uses as much as digits as its factorization.

14218921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95578.

The product of its digits is 1152, while the sum is 28.

The square root of 14218921 is about 3770.7984565606. The cubic root of 14218921 is about 242.2639982638.

The spelling of 14218921 in words is "fourteen million, two hundred eighteen thousand, nine hundred twenty-one".