3971245 has 4 divisors (see below), whose sum is σ = 4765500. Its totient is φ = 3176992.

The previous prime is 3971239. The next prime is 3971257. The reversal of 3971245 is 5421793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 806404 + 3164841 = 898^2 + 1779^2 .

It is a cyclic number.

It is not a de Polignac number, because 3971245 - 2⁵ = 3971213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397120 + ... + 397129.

It is an arithmetic number, because the mean of its divisors is an integer number (1191375).

Almost surely, 2^3971245 is an apocalyptic number.

It is an amenable number.

3971245 is a deficient number, since it is larger than the sum of its proper divisors (794255).

3971245 is an equidigital number, since it uses as much as digits as its factorization.

3971245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794254.

The product of its digits is 7560, while the sum is 31.

The square root of 3971245 is about 1992.7982838210. The cubic root of 3971245 is about 158.3588090740.

The spelling of 3971245 in words is "three million, nine hundred seventy-one thousand, two hundred forty-five".