3994161 has 16 divisors (see below), whose sum is σ = 5683200. Its totient is φ = 2487888.

The previous prime is 3994147. The next prime is 3994171. The reversal of 3994161 is 1614993.

It is not a de Polignac number, because 3994161 - 2¹⁴ = 3977777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3994121) 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, 4060 + ... + 4946.

It is an arithmetic number, because the mean of its divisors is an integer number (355200).

Almost surely, 2^3994161 is an apocalyptic number.

It is an amenable number.

3994161 is a deficient number, since it is larger than the sum of its proper divisors (1689039).

3994161 is a wasteful number, since it uses less digits than its factorization.

3994161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988.

The product of its digits is 5832, while the sum is 33.

The square root of 3994161 is about 1998.5397168933. The cubic root of 3994161 is about 158.6628272930.

Adding to 3994161 its product of digits (5832), we get a palindrome (3999993).

It can be divided in two parts, 399 and 4161, that added together give a triangular number (4560 = T₉₅).

The spelling of 3994161 in words is "three million, nine hundred ninety-four thousand, one hundred sixty-one".