3958081 has 4 divisors (see below), whose sum is σ = 3962500. Its totient is φ = 3953664.

The previous prime is 3958069. The next prime is 3958091. The reversal of 3958081 is 1808593.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1808593 = 887 ⋅2039.

It can be written as a sum of positive squares in 2 ways, for example, as 2496400 + 1461681 = 1580^2 + 1209^2 .

It is a cyclic number.

It is not a de Polignac number, because 3958081 - 2⁷ = 3957953 is a prime.

It is a super-2 number, since 2×3958081² = 31332810405122, which contains 22 as substring.

It is a Duffinian number.

3958081 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336 + ... + 2833.

It is an arithmetic number, because the mean of its divisors is an integer number (990625).

Almost surely, 2^3958081 is an apocalyptic number.

It is an amenable number.

3958081 is a deficient number, since it is larger than the sum of its proper divisors (4419).

3958081 is a wasteful number, since it uses less digits than its factorization.

3958081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 3958081 is about 1989.4926488932. The cubic root of 3958081 is about 158.1836378941.

The spelling of 3958081 in words is "three million, nine hundred fifty-eight thousand, eighty-one".