3971129 has 2 divisors, whose sum is σ = 3971130. Its totient is φ = 3971128.

The previous prime is 3971119. The next prime is 3971141. The reversal of 3971129 is 9211793.

It is a happy number.

3971129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3892729 + 78400 = 1973^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 3971129 - 2²⁰ = 2922553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3971095 and 3971104.

It is not a weakly prime, because it can be changed into another prime (3971119) 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 as a sum of consecutive naturals, namely, 1985564 + 1985565.

It is an arithmetic number, because the mean of its divisors is an integer number (1985565).

Almost surely, 2^3971129 is an apocalyptic number.

It is an amenable number.

3971129 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971129 is an equidigital number, since it uses as much as digits as its factorization.

3971129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 32.

The square root of 3971129 is about 1992.7691788062. The cubic root of 3971129 is about 158.3572671730.

The spelling of 3971129 in words is "three million, nine hundred seventy-one thousand, one hundred twenty-nine".