3971201 has 4 divisors (see below), whose sum is σ = 4276692. Its totient is φ = 3665712.

The previous prime is 3971167. The next prime is 3971207. The reversal of 3971201 is 1021793.

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

It can be written as a sum of positive squares in 2 ways, for example, as 361201 + 3610000 = 601^2 + 1900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3971201 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (3971207) 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, 152726 + ... + 152751.

It is an arithmetic number, because the mean of its divisors is an integer number (1069173).

Almost surely, 2^3971201 is an apocalyptic number.

It is an amenable number.

3971201 is a deficient number, since it is larger than the sum of its proper divisors (305491).

3971201 is a wasteful number, since it uses less digits than its factorization.

3971201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305490.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 3971201 is about 1992.7872440379. The cubic root of 3971201 is about 158.3582242185.

Adding to 3971201 its reverse (1021793), we get a palindrome (4992994).

The spelling of 3971201 in words is "three million, nine hundred seventy-one thousand, two hundred one".