1705213 has 4 divisors (see below), whose sum is σ = 1711008. Its totient is φ = 1699420.

The previous prime is 1705211. The next prime is 1705241. The reversal of 1705213 is 3125071.

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: 3125071 = 167 ⋅18713.

It is a cyclic number.

It is not a de Polignac number, because 1705213 - 2¹ = 1705211 is a prime.

It is a Duffinian number.

1705213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1705211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2431 + ... + 3052.

It is an arithmetic number, because the mean of its divisors is an integer number (427752).

2^1705213 is an apocalyptic number.

It is an amenable number.

1705213 is a deficient number, since it is larger than the sum of its proper divisors (5795).

1705213 is an equidigital number, since it uses as much as digits as its factorization.

1705213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5794.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1705213 is about 1305.8380450883. The cubic root of 1705213 is about 119.4701874126.

The spelling of 1705213 in words is "one million, seven hundred five thousand, two hundred thirteen".