3971530 has 8 divisors (see below), whose sum is σ = 7148772. Its totient is φ = 1588608.

The previous prime is 3971501. The next prime is 3971531. The reversal of 3971530 is 351793.

It can be written as a sum of positive squares in 2 ways, for example, as 3908529 + 63001 = 1977^2 + 251^2 .

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

It is not an unprimeable number, because it can be changed into a prime (3971531) 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, 198567 + ... + 198586.

Almost surely, 2^3971530 is an apocalyptic number.

3971530 is a deficient number, since it is larger than the sum of its proper divisors (3177242).

3971530 is a wasteful number, since it uses less digits than its factorization.

3971530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397160.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 3971530 is about 1992.8697900264. The cubic root of 3971530 is about 158.3625972379.

The spelling of 3971530 in words is "three million, nine hundred seventy-one thousand, five hundred thirty".