3867281 has 12 divisors (see below), whose sum is σ = 4392192. Its totient is φ = 3399000.

The previous prime is 3867271. The next prime is 3867323. The reversal of 3867281 is 1827683.

It is a de Polignac number, because none of the positive numbers 2^k-3867281 is a prime.

It is a super-2 number, since 2×3867281² = 29911724665922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3867221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3236 + ... + 4266.

It is an arithmetic number, because the mean of its divisors is an integer number (366016).

Almost surely, 2^3867281 is an apocalyptic number.

3867281 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3867281 is a deficient number, since it is larger than the sum of its proper divisors (524911).

3867281 is a wasteful number, since it uses less digits than its factorization.

3867281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1073 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 3867281 is about 1966.5403631759. The cubic root of 3867281 is about 156.9646694541.

It can be divided in two parts, 386 and 7281, that added together give a palindrome (7667).

The spelling of 3867281 in words is "three million, eight hundred sixty-seven thousand, two hundred eighty-one".