1672805 has 4 divisors (see below), whose sum is σ = 2007372. Its totient is φ = 1338240.

The previous prime is 1672799. The next prime is 1672849. The reversal of 1672805 is 5082761.

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 343396 + 1329409 = 586^2 + 1153^2 .

It is not a de Polignac number, because 1672805 - 2⁸ = 1672549 is a prime.

It is a Duffinian number.

It is a Curzon 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, 167276 + ... + 167285.

It is an arithmetic number, because the mean of its divisors is an integer number (501843).

2^1672805 is an apocalyptic number.

It is an amenable number.

1672805 is a deficient number, since it is larger than the sum of its proper divisors (334567).

1672805 is an equidigital number, since it uses as much as digits as its factorization.

1672805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334566.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1672805 is about 1293.3696300749. The cubic root of 1672805 is about 118.7084877984.

The spelling of 1672805 in words is "one million, six hundred seventy-two thousand, eight hundred five".