1672705 has 4 divisors (see below), whose sum is σ = 2007252.
Its totient is φ = 1338160.
The previous prime is 1672663. The next prime is 1672747. The reversal of 1672705 is 5072761.
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 (1672663) and next prime (1672747).
It can be written as a sum of positive squares in 2 ways, for example, as 848241 + 824464 = 921^2 + 908^2
It is not a de Polignac number, because 1672705 - 211 = 1670657 is a prime.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167266 + ... + 167275.
It is an arithmetic number, because the mean of its divisors is an integer number (501813).
21672705 is an apocalyptic number.
It is an amenable number.
1672705 is a deficient number, since it is larger than the sum of its proper divisors (334547).
1672705 is an equidigital number, since it uses as much as digits as its factorization.
1672705 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 334546.
The product of its (nonzero) digits is 2940, while the sum is 28.
The square root of 1672705 is about 1293.3309707882.
The cubic root of 1672705 is about 118.7061222935.
The spelling of 1672705 in words is "one million, six hundred seventy-two thousand, seven hundred five".