3946181 has 4 divisors (see below), whose sum is σ = 3953664. Its totient is φ = 3938700.

The previous prime is 3946177. The next prime is 3946183. The reversal of 3946181 is 1816493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1816493 = 7 ⋅259499.

It is a cyclic number.

It is not a de Polignac number, because 3946181 - 2² = 3946177 is a prime.

It is a super-2 number, since 2×3946181² = 31144688969522, 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 (3946183) 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, 2885 + ... + 4026.

It is an arithmetic number, because the mean of its divisors is an integer number (988416).

Almost surely, 2^3946181 is an apocalyptic number.

It is an amenable number.

3946181 is a deficient number, since it is larger than the sum of its proper divisors (7483).

3946181 is an equidigital number, since it uses as much as digits as its factorization.

3946181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7482.

The product of its digits is 5184, while the sum is 32.

The square root of 3946181 is about 1986.4996853763. The cubic root of 3946181 is about 158.0249519958.

The spelling of 3946181 in words is "three million, nine hundred forty-six thousand, one hundred eighty-one".