3958181 has 8 divisors (see below), whose sum is σ = 4195800. Its totient is φ = 3727360.

The previous prime is 3958177. The next prime is 3958183. The reversal of 3958181 is 1818593.

It can be written as a sum of positive squares in 4 ways, for example, as 17956 + 3940225 = 134^2 + 1985^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3958181 - 2² = 3958177 is a prime.

It is a super-2 number, since 2×3958181² = 31334393657522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476 + ... + 2853.

It is an arithmetic number, because the mean of its divisors is an integer number (524475).

Almost surely, 2^3958181 is an apocalyptic number.

It is an amenable number.

3958181 is a deficient number, since it is larger than the sum of its proper divisors (237619).

3958181 is a wasteful number, since it uses less digits than its factorization.

3958181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399.

The product of its digits is 8640, while the sum is 35.

The square root of 3958181 is about 1989.5177807700. The cubic root of 3958181 is about 158.1849700405.

Multiplying 3958181 by its sum of digits (35), we get a triangular number (138536335 = T₁₆₆₄₅).

The spelling of 3958181 in words is "three million, nine hundred fifty-eight thousand, one hundred eighty-one".