1605473 has 4 divisors (see below), whose sum is σ = 1639680. Its totient is φ = 1571268.

The previous prime is 1605433. The next prime is 1605509. The reversal of 1605473 is 3745061.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3745061 = 1013 ⋅3697.

It is a cyclic number.

It is not a de Polignac number, because 1605473 - 2⁸ = 1605217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1605413) 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, 17033 + ... + 17126.

It is an arithmetic number, because the mean of its divisors is an integer number (409920).

2^1605473 is an apocalyptic number.

It is an amenable number.

1605473 is a deficient number, since it is larger than the sum of its proper divisors (34207).

1605473 is an equidigital number, since it uses as much as digits as its factorization.

1605473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34206.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 1605473 is about 1267.0726103898. The cubic root of 1605473 is about 117.0939173348.

The spelling of 1605473 in words is "one million, six hundred five thousand, four hundred seventy-three".