13002905 has 4 divisors (see below), whose sum is σ = 15603492. Its totient is φ = 10402320.

The previous prime is 13002901. The next prime is 13002917. The reversal of 13002905 is 50920031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50920031 = 5923 ⋅8597.

It can be written as a sum of positive squares in 2 ways, for example, as 7546009 + 5456896 = 2747^2 + 2336^2 .

It is not a de Polignac number, because 13002905 - 2² = 13002901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13002901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300286 + ... + 1300295.

It is an arithmetic number, because the mean of its divisors is an integer number (3900873).

Almost surely, 2^13002905 is an apocalyptic number.

It is an amenable number.

13002905 is a deficient number, since it is larger than the sum of its proper divisors (2600587).

13002905 is an equidigital number, since it uses as much as digits as its factorization.

13002905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600586.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 13002905 is about 3605.9541039786. The cubic root of 13002905 is about 235.1509818965.

Adding to 13002905 its reverse (50920031), we get a palindrome (63922936).

The spelling of 13002905 in words is "thirteen million, two thousand, nine hundred five".