3906531 has 12 divisors (see below), whose sum is σ = 5666752. Its totient is φ = 2593296.

The previous prime is 3906493. The next prime is 3906541. The reversal of 3906531 is 1356093.

3906531 is a `hidden beast` number, since 3 + 9 + 0 + 653 + 1 = 666.

It is not a de Polignac number, because 3906531 - 2⁶ = 3906467 is a prime.

It is a super-2 number, since 2×3906531² = 30521968907922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3906495 and 3906504.

It is not an unprimeable number, because it can be changed into a prime (3906541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1710 + ... + 3276.

Almost surely, 2^3906531 is an apocalyptic number.

3906531 is a deficient number, since it is larger than the sum of its proper divisors (1760221).

3906531 is a wasteful number, since it uses less digits than its factorization.

3906531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850 (or 1847 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 3906531 is about 1976.4946243286. The cubic root of 3906531 is about 157.4939075497.

The spelling of 3906531 in words is "three million, nine hundred six thousand, five hundred thirty-one".