3916221 has 8 divisors (see below), whose sum is σ = 5241984. Its totient is φ = 2600640.

The previous prime is 3916193. The next prime is 3916229. The reversal of 3916221 is 1226193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3916221 - 2¹³ = 3908029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3916191 and 3916200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3916229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1596 + ... + 3221.

It is an arithmetic number, because the mean of its divisors is an integer number (655248).

Almost surely, 2^3916221 is an apocalyptic number.

It is an amenable number.

3916221 is a deficient number, since it is larger than the sum of its proper divisors (1325763).

3916221 is a wasteful number, since it uses less digits than its factorization.

3916221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091.

The product of its digits is 648, while the sum is 24.

The square root of 3916221 is about 1978.9444155913. The cubic root of 3916221 is about 157.6240192247.

The spelling of 3916221 in words is "three million, nine hundred sixteen thousand, two hundred twenty-one".