3961571 has 4 divisors (see below), whose sum is σ = 3991944. Its totient is φ = 3931200.

The previous prime is 3961541. The next prime is 3961579. The reversal of 3961571 is 1751693.

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 3961571 - 2¹⁸ = 3699427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3961579) 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 3 ways as a sum of consecutive naturals, for example, 14990 + ... + 15251.

It is an arithmetic number, because the mean of its divisors is an integer number (997986).

Almost surely, 2^3961571 is an apocalyptic number.

3961571 is a deficient number, since it is larger than the sum of its proper divisors (30373).

3961571 is a wasteful number, since it uses less digits than its factorization.

3961571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30372.

The product of its digits is 5670, while the sum is 32.

The square root of 3961571 is about 1990.3695636740. The cubic root of 3961571 is about 158.2301165385.

The spelling of 3961571 in words is "three million, nine hundred sixty-one thousand, five hundred seventy-one".