3912181 has 12 divisors (see below), whose sum is σ = 4842912. Its totient is φ = 3094416.

The previous prime is 3912131. The next prime is 3912199. The reversal of 3912181 is 1812193.

It is not a de Polignac number, because 3912181 - 2¹¹ = 3910133 is a prime.

It is a super-2 number, since 2×3912181² = 30610320353522, which contains 22 as substring.

It is a Duffinian number.

3912181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3912131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 471 + ... + 2836.

It is an arithmetic number, because the mean of its divisors is an integer number (403576).

Almost surely, 2^3912181 is an apocalyptic number.

It is an amenable number.

3912181 is a deficient number, since it is larger than the sum of its proper divisors (930731).

3912181 is a wasteful number, since it uses less digits than its factorization.

3912181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340 (or 3327 counting only the distinct ones).

The product of its digits is 432, while the sum is 25.

The square root of 3912181 is about 1977.9234059993. The cubic root of 3912181 is about 157.5697985752.

The spelling of 3912181 in words is "three million, nine hundred twelve thousand, one hundred eighty-one".