13471021 has 4 divisors (see below), whose sum is σ = 14263452. Its totient is φ = 12678592.

The previous prime is 13471013. The next prime is 13471033. The reversal of 13471021 is 12017431.

13471021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12017431 = 23 ⋅522497.

It can be written as a sum of positive squares in 2 ways, for example, as 4536900 + 8934121 = 2130^2 + 2989^2 .

It is a cyclic number.

It is not a de Polignac number, because 13471021 - 2³ = 13471013 is a prime.

It is a super-3 number, since 3×13471021³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13471021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13471091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396190 + ... + 396223.

It is an arithmetic number, because the mean of its divisors is an integer number (3565863).

Almost surely, 2^13471021 is an apocalyptic number.

It is an amenable number.

13471021 is a deficient number, since it is larger than the sum of its proper divisors (792431).

13471021 is an equidigital number, since it uses as much as digits as its factorization.

13471021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792430.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 13471021 is about 3670.2889532025. The cubic root of 13471021 is about 237.9396605740.

Adding to 13471021 its reverse (12017431), we get a palindrome (25488452).

The spelling of 13471021 in words is "thirteen million, four hundred seventy-one thousand, twenty-one".