13021005 has 16 divisors (see below), whose sum is σ = 21188160. Its totient is φ = 6826368.

The previous prime is 13020991. The next prime is 13021009. The reversal of 13021005 is 50012031.

It is not a de Polignac number, because 13021005 - 2²¹ = 10923853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6472 + ... + 8241.

It is an arithmetic number, because the mean of its divisors is an integer number (1324260).

Almost surely, 2^13021005 is an apocalyptic number.

13021005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13021005 is a deficient number, since it is larger than the sum of its proper divisors (8167155).

13021005 is a wasteful number, since it uses less digits than its factorization.

13021005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14780.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 13021005 is about 3608.4629691879. The cubic root of 13021005 is about 235.2600411006.

Adding to 13021005 its reverse (50012031), we get a palindrome (63033036).

The spelling of 13021005 in words is "thirteen million, twenty-one thousand, five".