3972447 has 12 divisors (see below), whose sum is σ = 5755464. Its totient is φ = 2640240.

The previous prime is 3972439. The next prime is 3972467. The reversal of 3972447 is 7442793.

It is not a de Polignac number, because 3972447 - 2³ = 3972439 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4753 + ... + 5525.

It is an arithmetic number, because the mean of its divisors is an integer number (479622).

Almost surely, 2^3972447 is an apocalyptic number.

3972447 is a deficient number, since it is larger than the sum of its proper divisors (1783017).

3972447 is a wasteful number, since it uses less digits than its factorization.

3972447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350 (or 1347 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 3972447 is about 1993.0998469720. The cubic root of 3972447 is about 158.3747845920.

The spelling of 3972447 in words is "three million, nine hundred seventy-two thousand, four hundred forty-seven".