12140285 has 4 divisors (see below), whose sum is σ = 14568348. Its totient is φ = 9712224.

The previous prime is 12140273. The next prime is 12140287. The reversal of 12140285 is 58204121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8031556 + 4108729 = 2834^2 + 2027^2 .

It is a cyclic number.

It is not a de Polignac number, because 12140285 - 2⁴ = 12140269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12140285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12140287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214024 + ... + 1214033.

It is an arithmetic number, because the mean of its divisors is an integer number (3642087).

Almost surely, 2^12140285 is an apocalyptic number.

It is an amenable number.

12140285 is a deficient number, since it is larger than the sum of its proper divisors (2428063).

12140285 is an equidigital number, since it uses as much as digits as its factorization.

12140285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428062.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 12140285 is about 3484.2911761218. The cubic root of 12140285 is about 229.8315401605.

The spelling of 12140285 in words is "twelve million, one hundred forty thousand, two hundred eighty-five".