3971501 has 2 divisors, whose sum is σ = 3971502. Its totient is φ = 3971500.

The previous prime is 3971483. The next prime is 3971531. The reversal of 3971501 is 1051793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3880900 + 90601 = 1970^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 3971501 - 2¹⁴ = 3955117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3971531) 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 as a sum of consecutive naturals, namely, 1985750 + 1985751.

It is an arithmetic number, because the mean of its divisors is an integer number (1985751).

Almost surely, 2^3971501 is an apocalyptic number.

It is an amenable number.

3971501 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971501 is an equidigital number, since it uses as much as digits as its factorization.

3971501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 3971501 is about 1992.8625140737. The cubic root of 3971501 is about 158.3622117839.

The spelling of 3971501 in words is "three million, nine hundred seventy-one thousand, five hundred one".