3958591 has 16 divisors (see below), whose sum is σ = 4995648. Its totient is φ = 3052800.

The previous prime is 3958589. The next prime is 3958601. The reversal of 3958591 is 1958593.

It is a cyclic number.

It is not a de Polignac number, because 3958591 - 2¹ = 3958589 is a prime.

3958591 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3201 + ... + 4261.

It is an arithmetic number, because the mean of its divisors is an integer number (312228).

Almost surely, 2^3958591 is an apocalyptic number.

3958591 is a deficient number, since it is larger than the sum of its proper divisors (1037057).

3958591 is a wasteful number, since it uses less digits than its factorization.

3958591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122.

The product of its digits is 48600, while the sum is 40.

The square root of 3958591 is about 1989.6208181460. The cubic root of 3958591 is about 158.1904316064.

The spelling of 3958591 in words is "three million, nine hundred fifty-eight thousand, five hundred ninety-one".