3943161 has 18 divisors (see below), whose sum is σ = 5924282. Its totient is φ = 2624400.

The previous prime is 3943153. The next prime is 3943171. The reversal of 3943161 is 1613493.

It can be written as a sum of positive squares in only one way, i.e., 3779136 + 164025 = 1944^2 + 405^2 .

It is not a de Polignac number, because 3943161 - 2³ = 3943153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

3943161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3943111) 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 17 ways as a sum of consecutive naturals, for example, 6261 + ... + 6861.

Almost surely, 2^3943161 is an apocalyptic number.

It is an amenable number.

3943161 is a deficient number, since it is larger than the sum of its proper divisors (1981121).

3943161 is an frugal number, since it uses more digits than its factorization.

3943161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 604 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 3943161 is about 1985.7394088853. The cubic root of 3943161 is about 157.9846297071.

The spelling of 3943161 in words is "three million, nine hundred forty-three thousand, one hundred sixty-one".