1604222 has 16 divisors (see below), whose sum is σ = 2637360. Its totient is φ = 728448.

The previous prime is 1604191. The next prime is 1604231. The reversal of 1604222 is 2224061.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1604222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173 + ... + 1799.

It is an arithmetic number, because the mean of its divisors is an integer number (164835).

2^1604222 is an apocalyptic number.

1604222 is a deficient number, since it is larger than the sum of its proper divisors (1033138).

1604222 is a wasteful number, since it uses less digits than its factorization.

1604222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1604222 is about 1266.5788566055. The cubic root of 1604222 is about 117.0634958631.

Adding to 1604222 its reverse (2224061), we get a palindrome (3828283).

The spelling of 1604222 in words is "one million, six hundred four thousand, two hundred twenty-two".