12140142 has 64 divisors (see below), whose sum is σ = 30067200. Its totient is φ = 3255168.

The previous prime is 12140131. The next prime is 12140143. The reversal of 12140142 is 24104121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12140143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34813 + ... + 35159.

It is an arithmetic number, because the mean of its divisors is an integer number (469800).

Almost surely, 2^12140142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12140142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15033600).

12140142 is an abundant number, since it is smaller than the sum of its proper divisors (17927058).

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

12140142 is a wasteful number, since it uses less digits than its factorization.

12140142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 12140142 is about 3484.2706553883. The cubic root of 12140142 is about 229.8306377643.

Adding to 12140142 its reverse (24104121), we get a palindrome (36244263).

The spelling of 12140142 in words is "twelve million, one hundred forty thousand, one hundred forty-two".