501604 has 12 divisors (see below), whose sum is σ = 888300. Its totient is φ = 247808.

The previous prime is 501601. The next prime is 501617. The reversal of 501604 is 406105.

It can be written as a sum of positive squares in 2 ways, for example, as 39204 + 462400 = 198^2 + 680^2 .

It is not an unprimeable number, because it can be changed into a prime (501601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349 + ... + 1060.

It is an arithmetic number, because the mean of its divisors is an integer number (74025).

2⁵⁰¹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

501604 is a deficient number, since it is larger than the sum of its proper divisors (386696).

501604 is a wasteful number, since it uses less digits than its factorization.

501604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502 (or 1500 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 501604 is about 708.2400722919. The cubic root of 501604 is about 79.4548350452.

Adding to 501604 its reverse (406105), we get a palindrome (907709).

It can be divided in two parts, 50 and 1604, that multiplied together give a triangular number (80200 = T₄₀₀).

The spelling of 501604 in words is "five hundred one thousand, six hundred four".