13284921 has 12 divisors (see below), whose sum is σ = 19181328. Its totient is φ = 8175024.

The previous prime is 13284917. The next prime is 13284923. The reversal of 13284921 is 12948231.

It is not a de Polignac number, because 13284921 - 2² = 13284917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13284923) 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 11 ways as a sum of consecutive naturals, for example, 12595 + ... + 13608.

It is an arithmetic number, because the mean of its divisors is an integer number (1598444).

Almost surely, 2^13284921 is an apocalyptic number.

It is an amenable number.

13284921 is a deficient number, since it is larger than the sum of its proper divisors (5896407).

13284921 is a wasteful number, since it uses less digits than its factorization.

13284921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26232 (or 26219 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 13284921 is about 3644.8485565247. The cubic root of 13284921 is about 236.8388764030.

It can be divided in two parts, 132849 and 21, that added together give a triangular number (132870 = T₅₁₅).

The spelling of 13284921 in words is "thirteen million, two hundred eighty-four thousand, nine hundred twenty-one".