1604117 has 4 divisors (see below), whose sum is σ = 1630476. Its totient is φ = 1577760.

The previous prime is 1604111. The next prime is 1604123. The reversal of 1604117 is 7114061.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1604111) and next prime (1604123).

It can be written as a sum of positive squares in 2 ways, for example, as 329476 + 1274641 = 574^2 + 1129^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604117 - 2⁴ = 1604101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604111) 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, 13088 + ... + 13209.

It is an arithmetic number, because the mean of its divisors is an integer number (407619).

2^1604117 is an apocalyptic number.

It is an amenable number.

1604117 is a deficient number, since it is larger than the sum of its proper divisors (26359).

1604117 is an equidigital number, since it uses as much as digits as its factorization.

1604117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26358.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1604117 is about 1266.5374056853. The cubic root of 1604117 is about 117.0609417828.

Adding to 1604117 its reverse (7114061), we get a palindrome (8718178).

The spelling of 1604117 in words is "one million, six hundred four thousand, one hundred seventeen".