3726581 has 2 divisors, whose sum is σ = 3726582. Its totient is φ = 3726580.

The previous prime is 3726571. The next prime is 3726599. The reversal of 3726581 is 1856273.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3724900 + 1681 = 1930^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 3726581 - 2¹⁸ = 3464437 is a prime.

It is a super-2 number, since 2×3726581² = 27774811899122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3726511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1863290 + 1863291.

It is an arithmetic number, because the mean of its divisors is an integer number (1863291).

Almost surely, 2^3726581 is an apocalyptic number.

It is an amenable number.

3726581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3726581 is an equidigital number, since it uses as much as digits as its factorization.

3726581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 3726581 is about 1930.4354431060. The cubic root of 3726581 is about 155.0375351344.

The spelling of 3726581 in words is "three million, seven hundred twenty-six thousand, five hundred eighty-one".