13003945 has 8 divisors (see below), whose sum is σ = 15692040. Its totient is φ = 10344960.

The previous prime is 13003937. The next prime is 13003951. The reversal of 13003945 is 54930031.

13003945 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 4 ways, for example, as 15129 + 12988816 = 123^2 + 3604^2 .

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

It is not a de Polignac number, because 13003945 - 2³ = 13003937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6280 + ... + 8089.

It is an arithmetic number, because the mean of its divisors is an integer number (1961505).

Almost surely, 2^13003945 is an apocalyptic number.

It is an amenable number.

13003945 is a deficient number, since it is larger than the sum of its proper divisors (2688095).

13003945 is a wasteful number, since it uses less digits than its factorization.

13003945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14555.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 13003945 is about 3606.0983070349. The cubic root of 13003945 is about 235.1572510213.

Adding to 13003945 its reverse (54930031), we get a palindrome (67933976).

The spelling of 13003945 in words is "thirteen million, three thousand, nine hundred forty-five".