3972755 has 4 divisors (see below), whose sum is σ = 4767312. Its totient is φ = 3178200.

The previous prime is 3972751. The next prime is 3972757. The reversal of 3972755 is 5572793.

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

It is not a de Polignac number, because 3972755 - 2² = 3972751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3972751) by changing a digit.

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, 397271 + ... + 397280.

It is an arithmetic number, because the mean of its divisors is an integer number (1191828).

Almost surely, 2^3972755 is an apocalyptic number.

3972755 is a deficient number, since it is larger than the sum of its proper divisors (794557).

3972755 is an equidigital number, since it uses as much as digits as its factorization.

3972755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794556.

The product of its digits is 66150, while the sum is 38.

The square root of 3972755 is about 1993.1771120500. The cubic root of 3972755 is about 158.3788776336.

Adding to 3972755 its sum of digits (38), we get a palindrome (3972793).

The spelling of 3972755 in words is "three million, nine hundred seventy-two thousand, seven hundred fifty-five".