4061581 has 2 divisors, whose sum is σ = 4061582. Its totient is φ = 4061580.

The previous prime is 4061579. The next prime is 4061609. The reversal of 4061581 is 1851604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3802500 + 259081 = 1950^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 4061581 - 2¹ = 4061579 is a prime.

It is a super-2 number, since 2×4061581² = 32992880439122, which contains 22 as substring.

Together with 4061579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4061081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2030790 + 2030791.

It is an arithmetic number, because the mean of its divisors is an integer number (2030791).

Almost surely, 2^4061581 is an apocalyptic number.

It is an amenable number.

4061581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4061581 is an equidigital number, since it uses as much as digits as its factorization.

4061581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 4061581 is about 2015.3364483381. The cubic root of 4061581 is about 159.5505747252.

The spelling of 4061581 in words is "four million, sixty-one thousand, five hundred eighty-one".