12051780 has 48 divisors (see below), whose sum is σ = 36343104. Its totient is φ = 2966400.

The previous prime is 12051779. The next prime is 12051811. The reversal of 12051780 is 8715021.

It is a self number, because there is not a number n which added to its sum of digits gives 12051780.

It is an unprimeable number.

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, 6946 + ... + 8505.

It is an arithmetic number, because the mean of its divisors is an integer number (757148).

Almost surely, 2^12051780 is an apocalyptic number.

12051780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12051780 is an abundant number, since it is smaller than the sum of its proper divisors (24291324).

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

12051780 is a wasteful number, since it uses less digits than its factorization.

12051780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15476 (or 15474 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 12051780 is about 3471.5673693593. The cubic root of 12051780 is about 229.2716721357.

The spelling of 12051780 in words is "twelve million, fifty-one thousand, seven hundred eighty".