3972385 has 4 divisors (see below), whose sum is σ = 4766868. Its totient is φ = 3177904.

The previous prime is 3972377. The next prime is 3972413. The reversal of 3972385 is 5832793.

3972385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5832793 = 89 ⋅65537.

It can be written as a sum of positive squares in 2 ways, for example, as 2313441 + 1658944 = 1521^2 + 1288^2 .

It is a cyclic number.

It is not a de Polignac number, because 3972385 - 2³ = 3972377 is a prime.

It is a Duffinian number.

3972385 is a lucky number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 397234 + ... + 397243.

It is an arithmetic number, because the mean of its divisors is an integer number (1191717).

Almost surely, 2^3972385 is an apocalyptic number.

It is an amenable number.

3972385 is a deficient number, since it is larger than the sum of its proper divisors (794483).

3972385 is an equidigital number, since it uses as much as digits as its factorization.

3972385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794482.

The product of its digits is 45360, while the sum is 37.

The square root of 3972385 is about 1993.0842932500. The cubic root of 3972385 is about 158.3739606424.

The spelling of 3972385 in words is "three million, nine hundred seventy-two thousand, three hundred eighty-five".