3971771 has 4 divisors (see below), whose sum is σ = 4036944. Its totient is φ = 3906600.

The previous prime is 3971749. The next prime is 3971791. The reversal of 3971771 is 1771793.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3971771 - 2¹⁴ = 3955387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3971731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32495 + ... + 32616.

It is an arithmetic number, because the mean of its divisors is an integer number (1009236).

Almost surely, 2^3971771 is an apocalyptic number.

3971771 is a deficient number, since it is larger than the sum of its proper divisors (65173).

3971771 is an equidigital number, since it uses as much as digits as its factorization.

3971771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65172.

The product of its digits is 9261, while the sum is 35.

The square root of 3971771 is about 1992.9302546753. The cubic root of 3971771 is about 158.3658004211.

The spelling of 3971771 in words is "three million, nine hundred seventy-one thousand, seven hundred seventy-one".