3812581 has 2 divisors, whose sum is σ = 3812582. Its totient is φ = 3812580.

The previous prime is 3812569. The next prime is 3812587. The reversal of 3812581 is 1852183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3481956 + 330625 = 1866^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 3812581 - 2⁷ = 3812453 is a prime.

It is a super-2 number, since 2×3812581² = 29071547763122, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

3812581 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3812587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1906290 + 1906291.

It is an arithmetic number, because the mean of its divisors is an integer number (1906291).

Almost surely, 2^3812581 is an apocalyptic number.

It is an amenable number.

3812581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3812581 is an equidigital number, since it uses as much as digits as its factorization.

3812581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 3812581 is about 1952.5831608410. The cubic root of 3812581 is about 156.2211005752.

The spelling of 3812581 in words is "three million, eight hundred twelve thousand, five hundred eighty-one".