1673605 has 4 divisors (see below), whose sum is σ = 2008332. Its totient is φ = 1338880.

The previous prime is 1673591. The next prime is 1673627. The reversal of 1673605 is 5063761.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1179396 + 494209 = 1086^2 + 703^2 .

It is not a de Polignac number, because 1673605 - 2¹⁷ = 1542533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167356 + ... + 167365.

It is an arithmetic number, because the mean of its divisors is an integer number (502083).

2^1673605 is an apocalyptic number.

It is an amenable number.

1673605 is a deficient number, since it is larger than the sum of its proper divisors (334727).

1673605 is an equidigital number, since it uses as much as digits as its factorization.

1673605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334726.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 1673605 is about 1293.6788627785. The cubic root of 1673605 is about 118.7274084447.

It can be divided in two parts, 1673 and 605, that added together give a triangular number (2278 = T₆₇).

The spelling of 1673605 in words is "one million, six hundred seventy-three thousand, six hundred five".