13282821 has 6 divisors (see below), whose sum is σ = 19186310. Its totient is φ = 8855208.

The previous prime is 13282769. The next prime is 13282853. The reversal of 13282821 is 12828231.

It can be written as a sum of positive squares in only one way, i.e., 8381025 + 4901796 = 2895^2 + 2214^2 .

It is not a de Polignac number, because 13282821 - 2⁶ = 13282757 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 (13282921) 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 5 ways as a sum of consecutive naturals, for example, 737926 + ... + 737943.

Almost surely, 2^13282821 is an apocalyptic number.

It is an amenable number.

13282821 is a deficient number, since it is larger than the sum of its proper divisors (5903489).

13282821 is a wasteful number, since it uses less digits than its factorization.

13282821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475875 (or 1475872 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 13282821 is about 3644.5604673266. The cubic root of 13282821 is about 236.8263963928.

The spelling of 13282821 in words is "thirteen million, two hundred eighty-two thousand, eight hundred twenty-one".