13329421 has 6 divisors (see below), whose sum is σ = 15505710. Its totient is φ = 11425176.

The previous prime is 13329413. The next prime is 13329451. The reversal of 13329421 is 12492331.

It can be written as a sum of positive squares in only one way, i.e., 12152196 + 1177225 = 3486^2 + 1085^2 .

It is not a de Polignac number, because 13329421 - 2³ = 13329413 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 (13329451) 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, 135966 + ... + 136063.

It is an arithmetic number, because the mean of its divisors is an integer number (2584285).

Almost surely, 2^13329421 is an apocalyptic number.

It is an amenable number.

13329421 is a deficient number, since it is larger than the sum of its proper divisors (2176289).

13329421 is an equidigital number, since it uses as much as digits as its factorization.

13329421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272043 (or 272036 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 13329421 is about 3650.9479590923. The cubic root of 13329421 is about 237.1030251101.

The spelling of 13329421 in words is "thirteen million, three hundred twenty-nine thousand, four hundred twenty-one".