12117142 has 8 divisors (see below), whose sum is σ = 18598536. Its totient is φ = 5917632.

The previous prime is 12117121. The next prime is 12117221. The reversal of 12117142 is 24171121.

12117142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70363 + ... + 70534.

It is an arithmetic number, because the mean of its divisors is an integer number (2324817).

Almost surely, 2^12117142 is an apocalyptic number.

12117142 is a deficient number, since it is larger than the sum of its proper divisors (6481394).

12117142 is a wasteful number, since it uses less digits than its factorization.

12117142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140942.

The product of its digits is 112, while the sum is 19.

The square root of 12117142 is about 3480.9685433798. The cubic root of 12117142 is about 229.6854047999.

Adding to 12117142 its reverse (24171121), we get a palindrome (36288263).

The spelling of 12117142 in words is "twelve million, one hundred seventeen thousand, one hundred forty-two".