12142420 has 48 divisors (see below), whose sum is σ = 27433728. Its totient is φ = 4497920.

The previous prime is 12142411. The next prime is 12142423. The reversal of 12142420 is 2424121.

12142420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12142394 and 12142403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23889 + ... + 24391.

It is an arithmetic number, because the mean of its divisors is an integer number (571536).

Almost surely, 2^12142420 is an apocalyptic number.

12142420 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 12142420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13716864).

12142420 is an abundant number, since it is smaller than the sum of its proper divisors (15291308).

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

12142420 is a wasteful number, since it uses less digits than its factorization.

12142420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 12142420 is about 3484.5975377366. The cubic root of 12142420 is about 229.8450121555.

Adding to 12142420 its reverse (2424121), we get a palindrome (14566541).

The spelling of 12142420 in words is "twelve million, one hundred forty-two thousand, four hundred twenty".