13021845 has 8 divisors (see below), whose sum is σ = 20834976. Its totient is φ = 6944976.

The previous prime is 13021843. The next prime is 13021861. The reversal of 13021845 is 54812031.

13021845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13021845 - 2¹ = 13021843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021843) 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, 434047 + ... + 434076.

It is an arithmetic number, because the mean of its divisors is an integer number (2604372).

Almost surely, 2^13021845 is an apocalyptic number.

13021845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13021845 is a deficient number, since it is larger than the sum of its proper divisors (7813131).

13021845 is an equidigital number, since it uses as much as digits as its factorization.

13021845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868131.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 13021845 is about 3608.5793603578. The cubic root of 13021845 is about 235.2650999571.

Adding to 13021845 its reverse (54812031), we get a palindrome (67833876).

The spelling of 13021845 in words is "thirteen million, twenty-one thousand, eight hundred forty-five".