3964181 has 4 divisors (see below), whose sum is σ = 4269132. Its totient is φ = 3659232.

The previous prime is 3964157. The next prime is 3964183. The reversal of 3964181 is 1814693.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 600625 + 3363556 = 775^2 + 1834^2 .

It is a cyclic number.

It is not a de Polignac number, because 3964181 - 2⁶ = 3964117 is a prime.

It is a super-2 number, since 2×3964181² = 31429462001522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3964183) 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 3 ways as a sum of consecutive naturals, for example, 152456 + ... + 152481.

It is an arithmetic number, because the mean of its divisors is an integer number (1067283).

Almost surely, 2^3964181 is an apocalyptic number.

It is an amenable number.

3964181 is a deficient number, since it is larger than the sum of its proper divisors (304951).

3964181 is a wasteful number, since it uses less digits than its factorization.

3964181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304950.

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

The square root of 3964181 is about 1991.0251128502. The cubic root of 3964181 is about 158.2648578017.

The spelling of 3964181 in words is "three million, nine hundred sixty-four thousand, one hundred eighty-one".