3972271 has 4 divisors (see below), whose sum is σ = 4205952. Its totient is φ = 3738592.

The previous prime is 3972263. The next prime is 3972301. The reversal of 3972271 is 1722793.

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

It is a cyclic number.

It is not a de Polignac number, because 3972271 - 2³ = 3972263 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116815 + ... + 116848.

It is an arithmetic number, because the mean of its divisors is an integer number (1051488).

Almost surely, 2^3972271 is an apocalyptic number.

3972271 is a deficient number, since it is larger than the sum of its proper divisors (233681).

3972271 is a wasteful number, since it uses less digits than its factorization.

3972271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233680.

The product of its digits is 5292, while the sum is 31.

The square root of 3972271 is about 1993.0556941541. The cubic root of 3972271 is about 158.3724456160.

It can be divided in two parts, 39722 and 71, that added together give a palindrome (39793).

The spelling of 3972271 in words is "three million, nine hundred seventy-two thousand, two hundred seventy-one".