3971140 has 24 divisors (see below), whose sum is σ = 8393112. Its totient is φ = 1578240.

The previous prime is 3971129. The next prime is 3971141. The reversal of 3971140 is 411793.

It can be written as a sum of positive squares in 4 ways, for example, as 66564 + 3904576 = 258^2 + 1976^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3072 + ... + 4168.

It is an arithmetic number, because the mean of its divisors is an integer number (349713).

Almost surely, 2^3971140 is an apocalyptic number.

It is an amenable number.

3971140 is an abundant number, since it is smaller than the sum of its proper divisors (4421972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3971140 is a wasteful number, since it uses less digits than its factorization.

3971140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287 (or 1285 counting only the distinct ones).

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

The square root of 3971140 is about 1992.7719387828. The cubic root of 3971140 is about 158.3574133890.

The spelling of 3971140 in words is "three million, nine hundred seventy-one thousand, one hundred forty".