1520604 has 18 divisors (see below), whose sum is σ = 3843840. Its totient is φ = 506856.

The previous prime is 1520587. The next prime is 1520611. The reversal of 1520604 is 4060251.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 21084 + ... + 21155.

2^1520604 is an apocalyptic number.

It is an amenable number.

1520604 is an abundant number, since it is smaller than the sum of its proper divisors (2323236).

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

1520604 is a wasteful number, since it uses less digits than its factorization.

1520604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42249 (or 42244 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1520604 is about 1233.1277306103. The cubic root of 1520604 is about 114.9931690965.

Adding to 1520604 its reverse (4060251), we get a palindrome (5580855).

The spelling of 1520604 in words is "one million, five hundred twenty thousand, six hundred four".