12011140 has 12 divisors (see below), whose sum is σ = 25223436. Its totient is φ = 4804448.

The previous prime is 12011123. The next prime is 12011143. The reversal of 12011140 is 4111021.

It can be written as a sum of positive squares in 2 ways, for example, as 7064964 + 4946176 = 2658^2 + 2224^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011143) 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 in 3 ways as a sum of consecutive naturals, for example, 300259 + ... + 300298.

It is an arithmetic number, because the mean of its divisors is an integer number (2101953).

Almost surely, 2^12011140 is an apocalyptic number.

12011140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011140 is an abundant number, since it is smaller than the sum of its proper divisors (13212296).

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

12011140 is a wasteful number, since it uses less digits than its factorization.

12011140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600566 (or 600564 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 12011140 is about 3465.7091626390. The cubic root of 12011140 is about 229.0136716919.

Adding to 12011140 its reverse (4111021), we get a palindrome (16122161).

The spelling of 12011140 in words is "twelve million, eleven thousand, one hundred forty".