4161881 has 2 divisors, whose sum is σ = 4161882. Its totient is φ = 4161880.

The previous prime is 4161853. The next prime is 4161943. The reversal of 4161881 is 1881614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3936256 + 225625 = 1984^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 4161881 - 2¹⁸ = 3899737 is a prime.

It is a super-2 number, since 2×4161881² = 34642506916322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4161811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2080940 + 2080941.

It is an arithmetic number, because the mean of its divisors is an integer number (2080941).

Almost surely, 2^4161881 is an apocalyptic number.

It is an amenable number.

4161881 is a deficient number, since it is larger than the sum of its proper divisors (1).

4161881 is an equidigital number, since it uses as much as digits as its factorization.

4161881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 29.

The square root of 4161881 is about 2040.0688713865. The cubic root of 4161881 is about 160.8532670280.

The spelling of 4161881 in words is "four million, one hundred sixty-one thousand, eight hundred eighty-one".