13024721 has 2 divisors, whose sum is σ = 13024722. Its totient is φ = 13024720.

The previous prime is 13024699. The next prime is 13024723. The reversal of 13024721 is 12742031.

13024721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6948496 + 6076225 = 2636^2 + 2465^2 .

It is an emirp because it is prime and its reverse (12742031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13024721 is a prime.

Together with 13024723, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13024693 and 13024702.

It is not a weakly prime, because it can be changed into another prime (13024723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6512360 + 6512361.

It is an arithmetic number, because the mean of its divisors is an integer number (6512361).

Almost surely, 2^13024721 is an apocalyptic number.

It is an amenable number.

13024721 is a deficient number, since it is larger than the sum of its proper divisors (1).

13024721 is an equidigital number, since it uses as much as digits as its factorization.

13024721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 13024721 is about 3608.9778331267. The cubic root of 13024721 is about 235.2824188706.

Adding to 13024721 its reverse (12742031), we get a palindrome (25766752).

The spelling of 13024721 in words is "thirteen million, twenty-four thousand, seven hundred twenty-one".