4058181 has 10 divisors (see below), whose sum is σ = 6062342. Its totient is φ = 2705400.

The previous prime is 4058167. The next prime is 4058209. The reversal of 4058181 is 1818504.

4058181 is a `hidden beast` number, since 4 + 0 + 581 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2772225 + 1285956 = 1665^2 + 1134^2 .

It is not a de Polignac number, because 4058181 - 2⁵ = 4058149 is a prime.

It is a super-2 number, since 2×4058181² = 32937666057522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Duffinian number.

4058181 is a modest number, since divided by 8181 gives 405 as remainder.

4058181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4058101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24970 + ... + 25131.

Almost surely, 2^4058181 is an apocalyptic number.

It is an amenable number.

4058181 is a deficient number, since it is larger than the sum of its proper divisors (2004161).

4058181 is an equidigital number, since it uses as much as digits as its factorization.

4058181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50113 (or 50104 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 4058181 is about 2014.4927401209. The cubic root of 4058181 is about 159.5060417060.

The spelling of 4058181 in words is "four million, fifty-eight thousand, one hundred eighty-one".