14197821 has 16 divisors (see below), whose sum is σ = 20774208. Its totient is φ = 8553600.

The previous prime is 14197759. The next prime is 14197837. The reversal of 14197821 is 12879141.

14197821 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 14197821 - 2¹¹ = 14195773 is a prime.

It is a super-2 number, since 2×14197821² = 403156242296082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14197871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4785 + ... + 7161.

It is an arithmetic number, because the mean of its divisors is an integer number (1298388).

Almost surely, 2^14197821 is an apocalyptic number.

14197821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

14197821 is a deficient number, since it is larger than the sum of its proper divisors (6576387).

14197821 is a wasteful number, since it uses less digits than its factorization.

14197821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572.

The product of its digits is 4032, while the sum is 33.

The square root of 14197821 is about 3767.9996019108. Note that the first 3 decimals coincide. The cubic root of 14197821 is about 242.1441040054.

The spelling of 14197821 in words is "fourteen million, one hundred ninety-seven thousand, eight hundred twenty-one".