12020856 has 32 divisors (see below), whose sum is σ = 30866640. Its totient is φ = 3898368.

The previous prime is 12020851. The next prime is 12020903. The reversal of 12020856 is 65802021.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5881 + ... + 7656.

Almost surely, 2^12020856 is an apocalyptic number.

It is an amenable number.

12020856 is an abundant number, since it is smaller than the sum of its proper divisors (18845784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12020856 is a wasteful number, since it uses less digits than its factorization.

12020856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13583 (or 13579 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 12020856 is about 3467.1106125995. The cubic root of 12020856 is about 229.0754059689.

Adding to 12020856 its reverse (65802021), we get a palindrome (77822877).

The spelling of 12020856 in words is "twelve million, twenty thousand, eight hundred fifty-six".