3921271 has 4 divisors (see below), whose sum is σ = 4151952. Its totient is φ = 3690592.

The previous prime is 3921227. The next prime is 3921287. The reversal of 3921271 is 1721293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1721293 = 7 ⋅245899.

It is a cyclic number.

It is not a de Polignac number, because 3921271 - 2⁷ = 3921143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921971) 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, 115315 + ... + 115348.

It is an arithmetic number, because the mean of its divisors is an integer number (1037988).

Almost surely, 2^3921271 is an apocalyptic number.

3921271 is a deficient number, since it is larger than the sum of its proper divisors (230681).

3921271 is a wasteful number, since it uses less digits than its factorization.

3921271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230680.

The product of its digits is 756, while the sum is 25.

The square root of 3921271 is about 1980.2199372797. The cubic root of 3921271 is about 157.6917426237.

The spelling of 3921271 in words is "three million, nine hundred twenty-one thousand, two hundred seventy-one".