12065778 has 12 divisors (see below), whose sum is σ = 26142558. Its totient is φ = 4021920.

The previous prime is 12065773. The next prime is 12065791. The reversal of 12065778 is 87756021.

It can be written as a sum of positive squares in only one way, i.e., 9715689 + 2350089 = 3117^2 + 1533^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12065773) 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 5 ways as a sum of consecutive naturals, for example, 335143 + ... + 335178.

Almost surely, 2^12065778 is an apocalyptic number.

12065778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12065778 is an abundant number, since it is smaller than the sum of its proper divisors (14076780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12065778 is a wasteful number, since it uses less digits than its factorization.

12065778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670329 (or 670326 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 12065778 is about 3473.5828765124. The cubic root of 12065778 is about 229.3604032368.

The spelling of 12065778 in words is "twelve million, sixty-five thousand, seven hundred seventy-eight".