3971231 has 16 divisors (see below), whose sum is σ = 4579200. Its totient is φ = 3410400.

The previous prime is 3971213. The next prime is 3971239. The reversal of 3971231 is 1321793.

3971231 = T₄₇₄ + T₄₇₅ + ... + T₅₀₆.

It is not a de Polignac number, because 3971231 - 2⁶ = 3971167 is a prime.

It is a super-2 number, since 2×3971231² = 31541351310722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3971231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18716 + ... + 18926.

It is an arithmetic number, because the mean of its divisors is an integer number (286200).

Almost surely, 2^3971231 is an apocalyptic number.

3971231 is a deficient number, since it is larger than the sum of its proper divisors (607969).

3971231 is a wasteful number, since it uses less digits than its factorization.

3971231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310.

The product of its digits is 1134, while the sum is 26.

The square root of 3971231 is about 1992.7947711694. The cubic root of 3971231 is about 158.3586229841.

The spelling of 3971231 in words is "three million, nine hundred seventy-one thousand, two hundred thirty-one".