3972785 has 4 divisors (see below), whose sum is σ = 4767348. Its totient is φ = 3178224.

The previous prime is 3972757. The next prime is 3972791. The reversal of 3972785 is 5872793.

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 3083536 + 889249 = 1756^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 3972785 - 2¹⁴ = 3956401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397274 + ... + 397283.

It is an arithmetic number, because the mean of its divisors is an integer number (1191837).

Almost surely, 2^3972785 is an apocalyptic number.

It is an amenable number.

3972785 is a deficient number, since it is larger than the sum of its proper divisors (794563).

3972785 is an equidigital number, since it uses as much as digits as its factorization.

3972785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794562.

The product of its digits is 105840, while the sum is 41.

The square root of 3972785 is about 1993.1846377092. The cubic root of 3972785 is about 158.3792762952.

The spelling of 3972785 in words is "three million, nine hundred seventy-two thousand, seven hundred eighty-five".