12720208 has 20 divisors (see below), whose sum is σ = 25051348. Its totient is φ = 6255360.

The previous prime is 12720187. The next prime is 12720229. The reversal of 12720208 is 80202721.

It is an interprime number because it is at equal distance from previous prime (12720187) and next prime (12720229).

It can be written as a sum of positive squares in 2 ways, for example, as 3429904 + 9290304 = 1852^2 + 3048^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5541 + ... + 7492.

Almost surely, 2^12720208 is an apocalyptic number.

It is an amenable number.

12720208 is a deficient number, since it is larger than the sum of its proper divisors (12331140).

12720208 is a wasteful number, since it uses less digits than its factorization.

12720208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13102 (or 13096 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 12720208 is about 3566.5400600582. The cubic root of 12720208 is about 233.4343363179.

Adding to 12720208 its reverse (80202721), we get a palindrome (92922929).

The spelling of 12720208 in words is "twelve million, seven hundred twenty thousand, two hundred eight".