3971715 has 16 divisors (see below), whose sum is σ = 6932736. Its totient is φ = 1925600.

The previous prime is 3971713. The next prime is 3971719. The reversal of 3971715 is 5171793.

3971715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3971715 - 2¹ = 3971713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

3971715 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3971713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11871 + ... + 12200.

It is an arithmetic number, because the mean of its divisors is an integer number (433296).

Almost surely, 2^3971715 is an apocalyptic number.

3971715 is a deficient number, since it is larger than the sum of its proper divisors (2961021).

3971715 is a wasteful number, since it uses less digits than its factorization.

3971715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24090.

The product of its digits is 6615, while the sum is 33.

The square root of 3971715 is about 1992.9162049620. The cubic root of 3971715 is about 158.3650561245.

It can be divided in two parts, 397 and 1715, that added together give a palindrome (2112).

The spelling of 3971715 in words is "three million, nine hundred seventy-one thousand, seven hundred fifteen".