12141281 has 8 divisors (see below), whose sum is σ = 12940200. Its totient is φ = 11351808.

The previous prime is 12141277. The next prime is 12141317. The reversal of 12141281 is 18214121.

12141281 = 18² + 19² + ... + 331².

It can be written as a sum of positive squares in 4 ways, for example, as 3385600 + 8755681 = 1840^2 + 2959^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12141281 - 2² = 12141277 is a prime.

It is a super-2 number, since 2×12141281² = 294821408641922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12141221) 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 7 ways as a sum of consecutive naturals, for example, 395 + ... + 4943.

It is an arithmetic number, because the mean of its divisors is an integer number (1617525).

Almost surely, 2^12141281 is an apocalyptic number.

It is an amenable number.

12141281 is a deficient number, since it is larger than the sum of its proper divisors (798919).

12141281 is a wasteful number, since it uses less digits than its factorization.

12141281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4723.

The product of its digits is 128, while the sum is 20.

The square root of 12141281 is about 3484.4341003956. The cubic root of 12141281 is about 229.8378251846.

The spelling of 12141281 in words is "twelve million, one hundred forty-one thousand, two hundred eighty-one".