12311420 has 48 divisors (see below), whose sum is σ = 28522368. Its totient is φ = 4426560.

The previous prime is 12311419. The next prime is 12311443. The reversal of 12311420 is 2411321.

It is a junction number, because it is equal to n+sod(n) for n = 12311395 and 12311404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23279 + ... + 23801.

It is an arithmetic number, because the mean of its divisors is an integer number (594216).

Almost surely, 2^12311420 is an apocalyptic number.

12311420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12311420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14261184).

12311420 is an abundant number, since it is smaller than the sum of its proper divisors (16210948).

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

12311420 is a wasteful number, since it uses less digits than its factorization.

12311420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 12311420 is about 3508.7633149017. The cubic root of 12311420 is about 230.9064418764.

Adding to 12311420 its reverse (2411321), we get a palindrome (14722741).

Subtracting from 12311420 its reverse (2411321), we obtain a palindrome (9900099).

The spelling of 12311420 in words is "twelve million, three hundred eleven thousand, four hundred twenty".