3971131 has 8 divisors (see below), whose sum is σ = 4178304. Its totient is φ = 3768960.

The previous prime is 3971129. The next prime is 3971141. The reversal of 3971131 is 1311793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3971131 - 2¹ = 3971129 is a prime.

It is a super-2 number, since 2×3971131² = 31539762838322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3971096 and 3971105.

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, 435 + ... + 2851.

It is an arithmetic number, because the mean of its divisors is an integer number (522288).

Almost surely, 2^3971131 is an apocalyptic number.

3971131 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3971131 is a deficient number, since it is larger than the sum of its proper divisors (207173).

3971131 is a wasteful number, since it uses less digits than its factorization.

3971131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501.

The product of its digits is 567, while the sum is 25.

The square root of 3971131 is about 1992.7696806204. The cubic root of 3971131 is about 158.3572937577.

The spelling of 3971131 in words is "three million, nine hundred seventy-one thousand, one hundred thirty-one".