13021217 has 8 divisors (see below), whose sum is σ = 14535840. Its totient is φ = 11561760.

The previous prime is 13021207. The next prime is 13021219. The reversal of 13021217 is 71212031.

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

It is a cyclic number.

It is not a de Polignac number, because 13021217 - 2¹⁴ = 13004833 is a prime.

It is a super-2 number, since 2×13021217² = 339104184322178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13021195 and 13021204.

It is not an unprimeable number, because it can be changed into a prime (13021219) 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, 13292 + ... + 14237.

It is an arithmetic number, because the mean of its divisors is an integer number (1816980).

Almost surely, 2^13021217 is an apocalyptic number.

It is an amenable number.

13021217 is a deficient number, since it is larger than the sum of its proper divisors (1514623).

13021217 is a wasteful number, since it uses less digits than its factorization.

13021217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27583.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 13021217 is about 3608.4923444563. The cubic root of 13021217 is about 235.2613178802.

Adding to 13021217 its reverse (71212031), we get a palindrome (84233248).

The spelling of 13021217 in words is "thirteen million, twenty-one thousand, two hundred seventeen".