704645 has 4 divisors (see below), whose sum is σ = 845580. Its totient is φ = 563712.

The previous prime is 704617. The next prime is 704647. The reversal of 704645 is 546407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546407 = 41 ⋅13327.

It can be written as a sum of positive squares in 2 ways, for example, as 293764 + 410881 = 542^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 704645 - 2⁶ = 704581 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (704647) by changing a digit.

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, 70460 + ... + 70469.

It is an arithmetic number, because the mean of its divisors is an integer number (211395).

2⁷⁰⁴⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

704645 is a deficient number, since it is larger than the sum of its proper divisors (140935).

704645 is a wasteful number, since it uses less digits than its factorization.

704645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140934.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 704645 is about 839.4313551447. The cubic root of 704645 is about 88.9863632686.

The spelling of 704645 in words is "seven hundred four thousand, six hundred forty-five".