12820072 has 8 divisors (see below), whose sum is σ = 24037650. Its totient is φ = 6410032.

The previous prime is 12820061. The next prime is 12820099. The reversal of 12820072 is 27002821.

12820072 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 only one way, i.e., 9156676 + 3663396 = 3026^2 + 1914^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×12820072³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801247 + ... + 801262.

Almost surely, 2^12820072 is an apocalyptic number.

It is an amenable number.

12820072 is a deficient number, since it is larger than the sum of its proper divisors (11217578).

12820072 is a wasteful number, since it uses less digits than its factorization.

12820072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602515 (or 1602511 counting only the distinct ones).

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

The square root of 12820072 is about 3580.5128124334. The cubic root of 12820072 is about 234.0436278748.

Adding to 12820072 its reverse (27002821), we get a palindrome (39822893).

The spelling of 12820072 in words is "twelve million, eight hundred twenty thousand, seventy-two".