12356420 has 24 divisors (see below), whose sum is σ = 26440344. Its totient is φ = 4848896.

The previous prime is 12356417. The next prime is 12356423. The reversal of 12356420 is 2465321.

It is an interprime number because it is at equal distance from previous prime (12356417) and next prime (12356423).

It can be written as a sum of positive squares in 4 ways, for example, as 3452164 + 8904256 = 1858^2 + 2984^2 .

It is a super-2 number, since 2×12356420² = 305362230432800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12356423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4769 + ... + 6888.

It is an arithmetic number, because the mean of its divisors is an integer number (1101681).

Almost surely, 2^12356420 is an apocalyptic number.

12356420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12356420 is an abundant number, since it is smaller than the sum of its proper divisors (14083924).

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

12356420 is a wasteful number, since it uses less digits than its factorization.

12356420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11719 (or 11717 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 12356420 is about 3515.1699816652. The cubic root of 12356420 is about 231.1874318188.

The spelling of 12356420 in words is "twelve million, three hundred fifty-six thousand, four hundred twenty".