12252420 has 72 divisors (see below), whose sum is σ = 38054016. Its totient is φ = 3189312.

The previous prime is 12252407. The next prime is 12252431. The reversal of 12252420 is 2425221.

12252420 is a `hidden beast` number, since 122 + 524 + 20 = 666.

12252420 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12252393 and 12252402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6949 + ... + 8531.

It is an arithmetic number, because the mean of its divisors is an integer number (528528).

Almost surely, 2^12252420 is an apocalyptic number.

12252420 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 12252420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19027008).

12252420 is an abundant number, since it is smaller than the sum of its proper divisors (25801596).

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

12252420 is a wasteful number, since it uses less digits than its factorization.

12252420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641 (or 1636 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12252420 is about 3500.3456972133. The cubic root of 12252420 is about 230.5369935433.

Adding to 12252420 its reverse (2425221), we get a palindrome (14677641).

The spelling of 12252420 in words is "twelve million, two hundred fifty-two thousand, four hundred twenty".