12200078 has 16 divisors (see below), whose sum is σ = 20173104. Its totient is φ = 5487360.

The previous prime is 12200063. The next prime is 12200117. The reversal of 12200078 is 87000221.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 725 + ... + 4992.

It is an arithmetic number, because the mean of its divisors is an integer number (1260819).

Almost surely, 2^12200078 is an apocalyptic number.

12200078 is a deficient number, since it is larger than the sum of its proper divisors (7973026).

12200078 is a wasteful number, since it uses less digits than its factorization.

12200078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5827.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 12200078 is about 3492.8610049643. The cubic root of 12200078 is about 230.2082424020.

Adding to 12200078 its reverse (87000221), we get a palindrome (99200299).

The spelling of 12200078 in words is "twelve million, two hundred thousand, seventy-eight".