1604532 has 12 divisors (see below), whose sum is σ = 3743936. Its totient is φ = 534840.

The previous prime is 1604521. The next prime is 1604539. The reversal of 1604532 is 2354061.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1604499 and 1604508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66844 + ... + 66867.

2^1604532 is an apocalyptic number.

1604532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1604532 is an abundant number, since it is smaller than the sum of its proper divisors (2139404).

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

1604532 is a wasteful number, since it uses less digits than its factorization.

1604532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133718 (or 133716 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1604532 is about 1266.7012275987. The cubic root of 1604532 is about 117.0710358308.

Adding to 1604532 its reverse (2354061), we get a palindrome (3958593).

The spelling of 1604532 in words is "one million, six hundred four thousand, five hundred thirty-two".