13964821 has 8 divisors (see below), whose sum is σ = 15150744. Its totient is φ = 12794880.

The previous prime is 13964807. The next prime is 13964861. The reversal of 13964821 is 12846931.

It can be written as a sum of positive squares in 4 ways, for example, as 378225 + 13586596 = 615^2 + 3686^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13964821 - 2¹³ = 13956629 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 (13964861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2140 + ... + 5701.

It is an arithmetic number, because the mean of its divisors is an integer number (1893843).

Almost surely, 2^13964821 is an apocalyptic number.

It is an amenable number.

13964821 is a deficient number, since it is larger than the sum of its proper divisors (1185923).

13964821 is a wasteful number, since it uses less digits than its factorization.

13964821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7991.

The product of its digits is 10368, while the sum is 34.

The square root of 13964821 is about 3736.9534382970. The cubic root of 13964821 is about 240.8121847254.

The spelling of 13964821 in words is "thirteen million, nine hundred sixty-four thousand, eight hundred twenty-one".