1523604 has 12 divisors (see below), whose sum is σ = 3555104. Its totient is φ = 507864.

The previous prime is 1523603. The next prime is 1523609. The reversal of 1523604 is 4063251.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1523603) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 63472 + ... + 63495.

2^1523604 is an apocalyptic number.

It is an amenable number.

1523604 is an abundant number, since it is smaller than the sum of its proper divisors (2031500).

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

1523604 is a wasteful number, since it uses less digits than its factorization.

1523604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126974 (or 126972 counting only the distinct ones).

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

The square root of 1523604 is about 1234.3435502323. The cubic root of 1523604 is about 115.0687427688.

Adding to 1523604 its reverse (4063251), we get a palindrome (5586855).

The spelling of 1523604 in words is "one million, five hundred twenty-three thousand, six hundred four".