13821207 has 8 divisors (see below), whose sum is σ = 18458880. Its totient is φ = 9198840.

The previous prime is 13821179. The next prime is 13821209. The reversal of 13821207 is 70212831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13821207 - 2⁷ = 13821079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13821209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1519 + ... + 5472.

It is an arithmetic number, because the mean of its divisors is an integer number (2307360).

Almost surely, 2^13821207 is an apocalyptic number.

13821207 is a deficient number, since it is larger than the sum of its proper divisors (4637673).

13821207 is an equidigital number, since it uses as much as digits as its factorization.

13821207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7653.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 13821207 is about 3717.6883946883. The cubic root of 13821207 is about 239.9838357169.

It can be divided in two parts, 13821 and 207, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13821207 in words is "thirteen million, eight hundred twenty-one thousand, two hundred seven".