12142105 has 8 divisors (see below), whose sum is σ = 14964552. Its totient is φ = 9451008.

The previous prime is 12142103. The next prime is 12142129. The reversal of 12142105 is 50124121.

It can be written as a sum of positive squares in 4 ways, for example, as 4721929 + 7420176 = 2173^2 + 2724^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12142105 - 2¹ = 12142103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12142103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32632 + ... + 33001.

It is an arithmetic number, because the mean of its divisors is an integer number (1870569).

Almost surely, 2^12142105 is an apocalyptic number.

It is an amenable number.

12142105 is a deficient number, since it is larger than the sum of its proper divisors (2822447).

12142105 is an equidigital number, since it uses as much as digits as its factorization.

12142105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65675.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 12142105 is about 3484.5523385365. The cubic root of 12142105 is about 229.8430245834.

Adding to 12142105 its reverse (50124121), we get a palindrome (62266226).

The spelling of 12142105 in words is "twelve million, one hundred forty-two thousand, one hundred five".