12042342 has 48 divisors (see below), whose sum is σ = 28658448. Its totient is φ = 3631680.

The previous prime is 12042319. The next prime is 12042343. The reversal of 12042342 is 24324021.

12042342 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (12042343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11917 + ... + 12887.

It is an arithmetic number, because the mean of its divisors is an integer number (597051).

Almost surely, 2^12042342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12042342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14329224).

12042342 is an abundant number, since it is smaller than the sum of its proper divisors (16616106).

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

12042342 is a wasteful number, since it uses less digits than its factorization.

12042342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12042342 is about 3470.2077747593. The cubic root of 12042342 is about 229.2118073648.

Adding to 12042342 its reverse (24324021), we get a palindrome (36366363).

The spelling of 12042342 in words is "twelve million, forty-two thousand, three hundred forty-two".