12122420 has 12 divisors (see below), whose sum is σ = 25457124. Its totient is φ = 4848960.

The previous prime is 12122419. The next prime is 12122443. The reversal of 12122420 is 2422121.

It can be written as a sum of positive squares in 2 ways, for example, as 2917264 + 9205156 = 1708^2 + 3034^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12122395 and 12122404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303041 + ... + 303080.

It is an arithmetic number, because the mean of its divisors is an integer number (2121427).

Almost surely, 2^12122420 is an apocalyptic number.

12122420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122420 is an abundant number, since it is smaller than the sum of its proper divisors (13334704).

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

12122420 is a wasteful number, since it uses less digits than its factorization.

12122420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606130 (or 606128 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 12122420 is about 3481.7265831768. The cubic root of 12122420 is about 229.7187488451.

Adding to 12122420 its reverse (2422121), we get a palindrome (14544541).

The spelling of 12122420 in words is "twelve million, one hundred twenty-two thousand, four hundred twenty".