12200642 has 4 divisors (see below), whose sum is σ = 18300966. Its totient is φ = 6100320.

The previous prime is 12200621. The next prime is 12200647. The reversal of 12200642 is 24600221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24600221 = 503 ⋅48907.

It can be written as a sum of positive squares in only one way, i.e., 11162281 + 1038361 = 3341^2 + 1019^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12200642.

It is not an unprimeable number, because it can be changed into a prime (12200647) 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 as a sum of consecutive naturals, namely, 3050159 + ... + 3050162.

Almost surely, 2^12200642 is an apocalyptic number.

12200642 is a deficient number, since it is larger than the sum of its proper divisors (6100324).

12200642 is an equidigital number, since it uses as much as digits as its factorization.

12200642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6100323.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 12200642 is about 3492.9417401382. The cubic root of 12200642 is about 230.2117897959.

Adding to 12200642 its reverse (24600221), we get a palindrome (36800863).

The spelling of 12200642 in words is "twelve million, two hundred thousand, six hundred forty-two".