3921284 has 6 divisors (see below), whose sum is σ = 6862254. Its totient is φ = 1960640.

The previous prime is 3921227. The next prime is 3921287. The reversal of 3921284 is 4821293.

It can be written as a sum of positive squares in only one way, i.e., 3534400 + 386884 = 1880^2 + 622^2 .

It is not an unprimeable number, because it can be changed into a prime (3921287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490157 + ... + 490164.

It is an arithmetic number, because the mean of its divisors is an integer number (1143709).

Almost surely, 2^3921284 is an apocalyptic number.

It is an amenable number.

3921284 is a deficient number, since it is larger than the sum of its proper divisors (2940970).

3921284 is a wasteful number, since it uses less digits than its factorization.

3921284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980325 (or 980323 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 3921284 is about 1980.2232197406. The cubic root of 3921284 is about 157.6919168861.

Subtracting 3921284 from its reverse (4821293), we obtain a palindrome (900009).

The spelling of 3921284 in words is "three million, nine hundred twenty-one thousand, two hundred eighty-four".