12802005 has 12 divisors (see below), whose sum is σ = 22190220. Its totient is φ = 6827712.

The previous prime is 12801989. The next prime is 12802033. The reversal of 12802005 is 50020821.

It can be written as a sum of positive squares in 2 ways, for example, as 9847044 + 2954961 = 3138^2 + 1719^2 .

It is not a de Polignac number, because 12802005 - 2⁴ = 12801989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142200 + ... + 142289.

It is an arithmetic number, because the mean of its divisors is an integer number (1849185).

Almost surely, 2^12802005 is an apocalyptic number.

12802005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12802005 is a deficient number, since it is larger than the sum of its proper divisors (9388215).

12802005 is a wasteful number, since it uses less digits than its factorization.

12802005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284500 (or 284497 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 12802005 is about 3577.9889602960. The cubic root of 12802005 is about 233.9336322851.

Adding to 12802005 its reverse (50020821), we get a palindrome (62822826).

The spelling of 12802005 in words is "twelve million, eight hundred two thousand, five".