3966531 has 4 divisors (see below), whose sum is σ = 5288712. Its totient is φ = 2644352.

The previous prime is 3966517. The next prime is 3966539. The reversal of 3966531 is 1356693.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3966531 - 2¹⁴ = 3950147 is a prime.

It is a super-2 number, since 2×3966531² = 31466736347922, which contains 22 as substring.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 3966492 and 3966501.

It is not an unprimeable number, because it can be changed into a prime (3966539) 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, 661086 + ... + 661091.

It is an arithmetic number, because the mean of its divisors is an integer number (1322178).

Almost surely, 2^3966531 is an apocalyptic number.

3966531 is a deficient number, since it is larger than the sum of its proper divisors (1322181).

3966531 is a wasteful number, since it uses less digits than its factorization.

3966531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322180.

The product of its digits is 14580, while the sum is 33.

The square root of 3966531 is about 1991.6151736719. The cubic root of 3966531 is about 158.2961252057.

The spelling of 3966531 in words is "three million, nine hundred sixty-six thousand, five hundred thirty-one".