1604013 has 4 divisors (see below), whose sum is σ = 2138688. Its totient is φ = 1069340.

The previous prime is 1604003. The next prime is 1604017. The reversal of 1604013 is 3104061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1604013 - 2⁶ = 1603949 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1603983 and 1604001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604017) 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, 267333 + ... + 267338.

It is an arithmetic number, because the mean of its divisors is an integer number (534672).

2^1604013 is an apocalyptic number.

It is an amenable number.

1604013 is a deficient number, since it is larger than the sum of its proper divisors (534675).

1604013 is an equidigital number, since it uses as much as digits as its factorization.

1604013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534674.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1604013 is about 1266.4963481984. The cubic root of 1604013 is about 117.0584119172.

Adding to 1604013 its reverse (3104061), we get a palindrome (4708074).

The spelling of 1604013 in words is "one million, six hundred four thousand, thirteen".