13021245 has 12 divisors (see below), whose sum is σ = 22570236. Its totient is φ = 6944640.

The previous prime is 13021219. The next prime is 13021247. The reversal of 13021245 is 54212031.

13021245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9253764 + 3767481 = 3042^2 + 1941^2 .

It is not a de Polignac number, because 13021245 - 2⁷ = 13021117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144636 + ... + 144725.

It is an arithmetic number, because the mean of its divisors is an integer number (1880853).

Almost surely, 2^13021245 is an apocalyptic number.

13021245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13021245 is a deficient number, since it is larger than the sum of its proper divisors (9548991).

13021245 is a wasteful number, since it uses less digits than its factorization.

13021245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289372 (or 289369 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 13021245 is about 3608.4962241909. The cubic root of 13021245 is about 235.2614865104.

Adding to 13021245 its reverse (54212031), we get a palindrome (67233276).

The spelling of 13021245 in words is "thirteen million, twenty-one thousand, two hundred forty-five".