12256420 has 24 divisors (see below), whose sum is σ = 28078848. Its totient is φ = 4456800.

The previous prime is 12256403. The next prime is 12256421. The reversal of 12256420 is 2465221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 12256391 and 12256400.

It is not an unprimeable number, because it can be changed into a prime (12256421) 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, 27636 + ... + 28075.

It is an arithmetic number, because the mean of its divisors is an integer number (1169952).

Almost surely, 2^12256420 is an apocalyptic number.

12256420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12256420 is an abundant number, since it is smaller than the sum of its proper divisors (15822428).

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

12256420 is a wasteful number, since it uses less digits than its factorization.

12256420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55731 (or 55729 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 12256420 is about 3500.9170227242. The cubic root of 12256420 is about 230.5620783196.

The spelling of 12256420 in words is "twelve million, two hundred fifty-six thousand, four hundred twenty".