13869021 has 8 divisors (see below), whose sum is σ = 18795424. Its totient is φ = 9094320.

The previous prime is 13869007. The next prime is 13869073. The reversal of 13869021 is 12096831.

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

It is not a de Polignac number, because 13869021 - 2⁷ = 13868893 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 13869021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13869721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37711 + ... + 38076.

It is an arithmetic number, because the mean of its divisors is an integer number (2349428).

Almost surely, 2^13869021 is an apocalyptic number.

It is an amenable number.

13869021 is a deficient number, since it is larger than the sum of its proper divisors (4926403).

13869021 is an equidigital number, since it uses as much as digits as its factorization.

13869021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75851.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 13869021 is about 3724.1134515479. The cubic root of 13869021 is about 240.2602558711.

The spelling of 13869021 in words is "thirteen million, eight hundred sixty-nine thousand, twenty-one".