13133421 has 36 divisors (see below), whose sum is σ = 22905792. Its totient is φ = 7498008.

The previous prime is 13133411. The next prime is 13133423. The reversal of 13133421 is 12433131.

13133421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13133421 - 2¹¹ = 13131373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13133394 and 13133403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13133423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11356 + ... + 12458.

It is an arithmetic number, because the mean of its divisors is an integer number (636272).

Almost surely, 2^13133421 is an apocalyptic number.

It is an amenable number.

13133421 is a deficient number, since it is larger than the sum of its proper divisors (9772371).

13133421 is an equidigital number, since it uses as much as digits as its factorization.

13133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1113 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 13133421 is about 3624.0062086040. The cubic root of 13133421 is about 235.9351361048.

Adding to 13133421 its reverse (12433131), we get a palindrome (25566552).

The spelling of 13133421 in words is "thirteen million, one hundred thirty-three thousand, four hundred twenty-one".