12142197 has 16 divisors (see below), whose sum is σ = 18936000. Its totient is φ = 7668432.

The previous prime is 12142177. The next prime is 12142217. The reversal of 12142197 is 79124121.

It is an interprime number because it is at equal distance from previous prime (12142177) and next prime (12142217).

It is a de Polignac number, because none of the positive numbers 2^k-12142197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12142197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11322 + ... + 12347.

It is an arithmetic number, because the mean of its divisors is an integer number (1183500).

Almost surely, 2^12142197 is an apocalyptic number.

It is an amenable number.

12142197 is a deficient number, since it is larger than the sum of its proper divisors (6793803).

12142197 is a wasteful number, since it uses less digits than its factorization.

12142197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23697 (or 23691 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 12142197 is about 3484.5655396333. The cubic root of 12142197 is about 229.8436050842.

The spelling of 12142197 in words is "twelve million, one hundred forty-two thousand, one hundred ninety-seven".