14340821 has 4 divisors (see below), whose sum is σ = 15644544. Its totient is φ = 13037100.

The previous prime is 14340797. The next prime is 14340827. The reversal of 14340821 is 12804341.

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 a cyclic number.

It is not a de Polignac number, because 14340821 - 2⁶ = 14340757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14340827) 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, 651845 + ... + 651866.

It is an arithmetic number, because the mean of its divisors is an integer number (3911136).

Almost surely, 2^14340821 is an apocalyptic number.

14340821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

14340821 is a deficient number, since it is larger than the sum of its proper divisors (1303723).

14340821 is a wasteful number, since it uses less digits than its factorization.

14340821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303722.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 14340821 is about 3786.9276465230. The cubic root of 14340821 is about 242.9543457164.

The spelling of 14340821 in words is "fourteen million, three hundred forty thousand, eight hundred twenty-one".