13305021 has 8 divisors (see below), whose sum is σ = 17792544. Its totient is φ = 8843760.

The previous prime is 13305013. The next prime is 13305041. The reversal of 13305021 is 12050331.

It is a happy number.

13305021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13305021 - 2³ = 13305013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13305001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5350 + ... + 7431.

It is an arithmetic number, because the mean of its divisors is an integer number (2224068).

Almost surely, 2^13305021 is an apocalyptic number.

It is an amenable number.

13305021 is a deficient number, since it is larger than the sum of its proper divisors (4487523).

13305021 is a wasteful number, since it uses less digits than its factorization.

13305021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13131.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 13305021 is about 3647.6048305703. The cubic root of 13305021 is about 236.9582614457.

Adding to 13305021 its reverse (12050331), we get a palindrome (25355352).

The spelling of 13305021 in words is "thirteen million, three hundred five thousand, twenty-one".