3971258201 has 4 divisors (see below), whose sum is σ = 3980430132. Its totient is φ = 3962086272.

The previous prime is 3971258197. The next prime is 3971258227. The reversal of 3971258201 is 1028521793.

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 497334601 + 3473923600 = 22301^2 + 58940^2 .

It is a cyclic number.

It is not a de Polignac number, because 3971258201 - 2² = 3971258197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3971258261) 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, 4585316 + ... + 4586181.

It is an arithmetic number, because the mean of its divisors is an integer number (995107533).

Almost surely, 2^3971258201 is an apocalyptic number.

It is an amenable number.

3971258201 is a deficient number, since it is larger than the sum of its proper divisors (9171931).

3971258201 is an equidigital number, since it uses as much as digits as its factorization.

3971258201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9171930.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 3971258201 is about 63017.9196816271. The cubic root of 3971258201 is about 1583.5898454313.

Adding to 3971258201 its reverse (1028521793), we get a palindrome (4999779994).

The spelling of 3971258201 in words is "three billion, nine hundred seventy-one million, two hundred fifty-eight thousand, two hundred one".