3971401 has 6 divisors (see below), whose sum is σ = 4619850. Its totient is φ = 3404016.

The previous prime is 3971393. The next prime is 3971411. The reversal of 3971401 is 1041793.

3971401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2637376 + 1334025 = 1624^2 + 1155^2 .

It is not a de Polignac number, because 3971401 - 2³ = 3971393 is a prime.

It is a Duffinian number.

3971401 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3971411) 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 in 5 ways as a sum of consecutive naturals, for example, 40476 + ... + 40573.

It is an arithmetic number, because the mean of its divisors is an integer number (769975).

Almost surely, 2^3971401 is an apocalyptic number.

It is an amenable number.

3971401 is a deficient number, since it is larger than the sum of its proper divisors (648449).

3971401 is an equidigital number, since it uses as much as digits as its factorization.

3971401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81063 (or 81056 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 3971401 is about 1992.8374243776. The cubic root of 3971401 is about 158.3608826178.

The spelling of 3971401 in words is "three million, nine hundred seventy-one thousand, four hundred one".