4175981 has 2 divisors, whose sum is σ = 4175982. Its totient is φ = 4175980.

The previous prime is 4175957. The next prime is 4175989. The reversal of 4175981 is 1895714.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3031081 + 1144900 = 1741^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 4175981 - 2¹⁸ = 3913837 is a prime.

It is a super-2 number, since 2×4175981² = 34877634624722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4175989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2087990 + 2087991.

It is an arithmetic number, because the mean of its divisors is an integer number (2087991).

Almost surely, 2^4175981 is an apocalyptic number.

It is an amenable number.

4175981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4175981 is an equidigital number, since it uses as much as digits as its factorization.

4175981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 35.

The square root of 4175981 is about 2043.5217150791. The cubic root of 4175981 is about 161.0347133975.

The spelling of 4175981 in words is "four million, one hundred seventy-five thousand, nine hundred eighty-one".