3668281 has 4 divisors (see below), whose sum is σ = 3702672. Its totient is φ = 3633892.

The previous prime is 3668279. The next prime is 3668299. The reversal of 3668281 is 1828663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3668281 - 2¹ = 3668279 is a prime.

It is a super-2 number, since 2×3668281² = 26912570989922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3668221) 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, 17035 + ... + 17248.

It is an arithmetic number, because the mean of its divisors is an integer number (925668).

Almost surely, 2^3668281 is an apocalyptic number.

It is an amenable number.

3668281 is a deficient number, since it is larger than the sum of its proper divisors (34391).

3668281 is a wasteful number, since it uses less digits than its factorization.

3668281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34390.

The product of its digits is 13824, while the sum is 34.

The square root of 3668281 is about 1915.2756981698. The cubic root of 3668281 is about 154.2247939886.

It can be divided in two parts, 36682 and 81, that added together give a palindrome (36763).

The spelling of 3668281 in words is "three million, six hundred sixty-eight thousand, two hundred eighty-one".