3165981 has 16 divisors (see below), whose sum is σ = 5195904. Its totient is φ = 1669824.

The previous prime is 3165971. The next prime is 3165991. The reversal of 3165981 is 1895613.

3165981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3165971) and next prime (3165991).

It is not a de Polignac number, because 3165981 - 2⁶ = 3165917 is a prime.

It is a super-2 number, since 2×3165981² = 20046871384722, which contains 22 as substring.

3165981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3165941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5526 + ... + 6071.

It is an arithmetic number, because the mean of its divisors is an integer number (324744).

Almost surely, 2^3165981 is an apocalyptic number.

It is an amenable number.

3165981 is a deficient number, since it is larger than the sum of its proper divisors (2029923).

3165981 is a wasteful number, since it uses less digits than its factorization.

3165981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11620.

The product of its digits is 6480, while the sum is 33.

The square root of 3165981 is about 1779.3203758739. The cubic root of 3165981 is about 146.8372023456.

The spelling of 3165981 in words is "three million, one hundred sixty-five thousand, nine hundred eighty-one".