1605113 has 4 divisors (see below), whose sum is σ = 1608528. Its totient is φ = 1601700.

The previous prime is 1605103. The next prime is 1605127. The reversal of 1605113 is 3115061.

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 1605113 - 2⁸ = 1604857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1605091 and 1605100.

It is not an unprimeable number, because it can be changed into a prime (1605103) 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, 863 + ... + 1988.

It is an arithmetic number, because the mean of its divisors is an integer number (402132).

2^1605113 is an apocalyptic number.

It is an amenable number.

1605113 is a deficient number, since it is larger than the sum of its proper divisors (3415).

1605113 is an equidigital number, since it uses as much as digits as its factorization.

1605113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1605113 is about 1266.9305426897. The cubic root of 1605113 is about 117.0851645744.

The spelling of 1605113 in words is "one million, six hundred five thousand, one hundred thirteen".