3921306 has 16 divisors (see below), whose sum is σ = 7876224. Its totient is φ = 1301504.

The previous prime is 3921301. The next prime is 3921343. The reversal of 3921306 is 6031293.

It is not an unprimeable number, because it can be changed into a prime (3921301) 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, 271 + ... + 2813.

It is an arithmetic number, because the mean of its divisors is an integer number (492264).

Almost surely, 2^3921306 is an apocalyptic number.

3921306 is an abundant number, since it is smaller than the sum of its proper divisors (3954918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3921306 is a wasteful number, since it uses less digits than its factorization.

3921306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 3921306 is about 1980.2287746622. The cubic root of 3921306 is about 157.6922117908.

Adding to 3921306 its reverse (6031293), we get a palindrome (9952599).

The spelling of 3921306 in words is "three million, nine hundred twenty-one thousand, three hundred six".