1604556 has 48 divisors (see below), whose sum is σ = 4233600. Its totient is φ = 525456.

The previous prime is 1604543. The next prime is 1604557. The reversal of 1604556 is 6554061.

It is a happy number.

1604556 is a `hidden beast` number, since 1 + 604 + 5 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1604557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8875 + ... + 9053.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

2^1604556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1604556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2116800).

1604556 is an abundant number, since it is smaller than the sum of its proper divisors (2629044).

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

1604556 is a wasteful number, since it uses less digits than its factorization.

1604556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1604556 is about 1266.7107009890. The cubic root of 1604556 is about 117.0716195298.

It can be divided in two parts, 160455 and 6, that added together give a triangular number (160461 = T₅₆₆).

The spelling of 1604556 in words is "one million, six hundred four thousand, five hundred fifty-six".