13120816 has 10 divisors (see below), whose sum is σ = 25421612. Its totient is φ = 6560400.

The previous prime is 13120813. The next prime is 13120823. The reversal of 13120816 is 61802131.

It is not an unprimeable number, because it can be changed into a prime (13120813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410010 + ... + 410041.

Almost surely, 2^13120816 is an apocalyptic number.

13120816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13120816 is a deficient number, since it is larger than the sum of its proper divisors (12300796).

13120816 is an equidigital number, since it uses as much as digits as its factorization.

13120816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820059 (or 820053 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 13120816 is about 3622.2666936602. The cubic root of 13120816 is about 235.8596311689.

Adding to 13120816 its reverse (61802131), we get a palindrome (74922947).

The spelling of 13120816 in words is "thirteen million, one hundred twenty thousand, eight hundred sixteen".