3971559 has 8 divisors (see below), whose sum is σ = 5374720. Its totient is φ = 2608056.

The previous prime is 3971549. The next prime is 3971581. The reversal of 3971559 is 9551793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3971559 - 2⁷ = 3971431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9679 + ... + 10080.

It is an arithmetic number, because the mean of its divisors is an integer number (671840).

Almost surely, 2^3971559 is an apocalyptic number.

3971559 is a deficient number, since it is larger than the sum of its proper divisors (1403161).

3971559 is a wasteful number, since it uses less digits than its factorization.

3971559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19829.

The product of its digits is 42525, while the sum is 39.

The square root of 3971559 is about 1992.8770659526. The cubic root of 3971559 is about 158.3629826901.

The spelling of 3971559 in words is "three million, nine hundred seventy-one thousand, five hundred fifty-nine".