3921224 has 32 divisors (see below), whose sum is σ = 7784640. Its totient is φ = 1848000.

The previous prime is 3921217. The next prime is 3921227. The reversal of 3921224 is 4221293.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 3921224.

It is not an unprimeable number, because it can be changed into a prime (3921227) 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, 18479 + ... + 18689.

It is an arithmetic number, because the mean of its divisors is an integer number (243270).

Almost surely, 2^3921224 is an apocalyptic number.

It is an amenable number.

3921224 is a deficient number, since it is larger than the sum of its proper divisors (3863416).

3921224 is a wasteful number, since it uses less digits than its factorization.

3921224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 337 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 3921224 is about 1980.2080698755. The cubic root of 3921224 is about 157.6911125949.

It can be divided in two parts, 3 and 921224, that multiplied together give a palindrome (2763672).

The spelling of 3921224 in words is "three million, nine hundred twenty-one thousand, two hundred twenty-four".