13480821 has 6 divisors (see below), whose sum is σ = 19472310. Its totient is φ = 8987208.

The previous prime is 13480807. The next prime is 13480843. The reversal of 13480821 is 12808431.

It can be written as a sum of positive squares in only one way, i.e., 9678321 + 3802500 = 3111^2 + 1950^2 .

It is not a de Polignac number, because 13480821 - 2⁶ = 13480757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13480891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 748926 + ... + 748943.

It is an arithmetic number, because the mean of its divisors is an integer number (3245385).

Almost surely, 2^13480821 is an apocalyptic number.

It is an amenable number.

13480821 is a deficient number, since it is larger than the sum of its proper divisors (5991489).

13480821 is a wasteful number, since it uses less digits than its factorization.

13480821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497875 (or 1497872 counting only the distinct ones).

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

The square root of 13480821 is about 3671.6237552342. The cubic root of 13480821 is about 237.9973459676.

The spelling of 13480821 in words is "thirteen million, four hundred eighty thousand, eight hundred twenty-one".