3995531 has 4 divisors (see below), whose sum is σ = 4000200. Its totient is φ = 3990864.

The previous prime is 3995513. The next prime is 3995543. The reversal of 3995531 is 1355993.

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: 1355993 = 41 ⋅33073.

It is a cyclic number.

It is not a de Polignac number, because 3995531 - 2¹⁴ = 3979147 is a prime.

It is a super-2 number, since 2×3995531² = 31928535943922, 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 = 3995491 and 3995500.

It is not an unprimeable number, because it can be changed into a prime (3995581) 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, 641 + ... + 2898.

It is an arithmetic number, because the mean of its divisors is an integer number (1000050).

Almost surely, 2^3995531 is an apocalyptic number.

3995531 is a deficient number, since it is larger than the sum of its proper divisors (4669).

3995531 is a wasteful number, since it uses less digits than its factorization.

3995531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668.

The product of its digits is 18225, while the sum is 35.

The square root of 3995531 is about 1998.8824377637. The cubic root of 3995531 is about 158.6809657060.

The spelling of 3995531 in words is "three million, nine hundred ninety-five thousand, five hundred thirty-one".