12140281 has 4 divisors (see below), whose sum is σ = 12339364. Its totient is φ = 11941200.

The previous prime is 12140273. The next prime is 12140287. The reversal of 12140281 is 18204121.

It is a happy number.

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 341056 + 11799225 = 584^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 12140281 - 2³ = 12140273 is a prime.

It is a super-2 number, since 2×12140281² = 294772845517922, which contains 22 as substring.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99450 + ... + 99571.

It is an arithmetic number, because the mean of its divisors is an integer number (3084841).

Almost surely, 2^12140281 is an apocalyptic number.

It is an amenable number.

12140281 is a deficient number, since it is larger than the sum of its proper divisors (199083).

12140281 is an equidigital number, since it uses as much as digits as its factorization.

12140281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199082.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 12140281 is about 3484.2906021169. The cubic root of 12140281 is about 229.8315149187.

It can be divided in two parts, 12140 and 281, that added together give a palindrome (12421).

The spelling of 12140281 in words is "twelve million, one hundred forty thousand, two hundred eighty-one".