3866131 has 4 divisors (see below), whose sum is σ = 3870832. Its totient is φ = 3861432.

The previous prime is 3866117. The next prime is 3866141. The reversal of 3866131 is 1316683.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1316683 = 233 ⋅5651.

It is a cyclic number.

It is not a de Polignac number, because 3866131 - 2⁵ = 3866099 is a prime.

It is a super-2 number, since 2×3866131² = 29893937818322, which contains 22 as substring.

It is a Duffinian number.

3866131 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3866131.

It is not an unprimeable number, because it can be changed into a prime (3866141) 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, 756 + ... + 2881.

It is an arithmetic number, because the mean of its divisors is an integer number (967708).

Almost surely, 2^3866131 is an apocalyptic number.

3866131 is a deficient number, since it is larger than the sum of its proper divisors (4701).

3866131 is a wasteful number, since it uses less digits than its factorization.

3866131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700.

The product of its digits is 2592, while the sum is 28.

The square root of 3866131 is about 1966.2479497764. The cubic root of 3866131 is about 156.9491092310.

The spelling of 3866131 in words is "three million, eight hundred sixty-six thousand, one hundred thirty-one".