3806281 has 2 divisors, whose sum is σ = 3806282. Its totient is φ = 3806280.

The previous prime is 3806233. The next prime is 3806287. The reversal of 3806281 is 1826083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3575881 + 230400 = 1891^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 3806281 - 2¹¹ = 3804233 is a prime.

It is a super-2 number, since 2×3806281² = 28975550101922, which contains 22 as substring.

3806281 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3806287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1903140 + 1903141.

It is an arithmetic number, because the mean of its divisors is an integer number (1903141).

Almost surely, 2^3806281 is an apocalyptic number.

3806281 is the 873-rd centered decagonal number.

It is an amenable number.

3806281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3806281 is an equidigital number, since it uses as much as digits as its factorization.

3806281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 3806281 is about 1950.9692462978. The cubic root of 3806281 is about 156.1350053086.

The spelling of 3806281 in words is "three million, eight hundred six thousand, two hundred eighty-one".