12285281 has 8 divisors (see below), whose sum is σ = 12705000. Its totient is φ = 11871360.

The previous prime is 12285277. The next prime is 12285349. The reversal of 12285281 is 18258221.

It is a happy number.

12285281 is nontrivially palindromic in base 5.

It can be written as a sum of positive squares in 4 ways, for example, as 256 + 12285025 = 16^2 + 3505^2 .

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 12285281 - 2² = 12285277 is a prime.

It is a super-2 number, since 2×12285281² = 301856258497922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12285881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3095 + ... + 5843.

It is an arithmetic number, because the mean of its divisors is an integer number (1588125).

Almost surely, 2^12285281 is an apocalyptic number.

12285281 is the 1568-th centered decagonal number.

It is an amenable number.

12285281 is a deficient number, since it is larger than the sum of its proper divisors (419719).

12285281 is a wasteful number, since it uses less digits than its factorization.

12285281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2899.

The product of its digits is 2560, while the sum is 29.

The square root of 12285281 is about 3505.0365190680. The cubic root of 12285281 is about 230.7429096960.

The spelling of 12285281 in words is "twelve million, two hundred eighty-five thousand, two hundred eighty-one".