1604226 has 32 divisors (see below), whose sum is σ = 3503808. Its totient is φ = 486720.

The previous prime is 1604191. The next prime is 1604231. The reversal of 1604226 is 6224061.

1604226 = 39² + 40² + ... + 169².

It is a happy number.

1604226 is nontrivially palindromic in base 12.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10140 + ... + 10296.

It is an arithmetic number, because the mean of its divisors is an integer number (109494).

2^1604226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1604226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1751904).

1604226 is an abundant number, since it is smaller than the sum of its proper divisors (1899582).

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

1604226 is a wasteful number, since it uses less digits than its factorization.

1604226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1604226 is about 1266.5804356613. The cubic root of 1604226 is about 117.0635931592.

Adding to 1604226 its reverse (6224061), we get a palindrome (7828287).

It can be divided in two parts, 1604 and 226, that added together give a triangular number (1830 = T₆₀).

The spelling of 1604226 in words is "one million, six hundred four thousand, two hundred twenty-six".