3958581 has 16 divisors (see below), whose sum is σ = 5806080. Its totient is φ = 2379120.

The previous prime is 3958543. The next prime is 3958583. The reversal of 3958581 is 1858593.

It is not a de Polignac number, because 3958581 - 2⁹ = 3958069 is a prime.

It is a super-2 number, since 2×3958581² = 31340727067122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958583) 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 15 ways as a sum of consecutive naturals, for example, 4156 + ... + 5018.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^3958581 is an apocalyptic number.

It is an amenable number.

3958581 is a deficient number, since it is larger than the sum of its proper divisors (1847499).

3958581 is a wasteful number, since it uses less digits than its factorization.

3958581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016.

The product of its digits is 43200, while the sum is 39.

The square root of 3958581 is about 1989.6183051028. The cubic root of 3958581 is about 158.1902984019.

The spelling of 3958581 in words is "three million, nine hundred fifty-eight thousand, five hundred eighty-one".