704561 has 12 divisors (see below), whose sum is σ = 834480. Its totient is φ = 589680.

The previous prime is 704551. The next prime is 704567. The reversal of 704561 is 165407.

It is not a de Polignac number, because 704561 - 2¹⁰ = 703537 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (704567) 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 11 ways as a sum of consecutive naturals, for example, 1670 + ... + 2048.

It is an arithmetic number, because the mean of its divisors is an integer number (69540).

2⁷⁰⁴⁵⁶¹ is an apocalyptic number.

It is an amenable number.

704561 is a deficient number, since it is larger than the sum of its proper divisors (129919).

704561 is a wasteful number, since it uses less digits than its factorization.

704561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 704561 is about 839.3813197826. The cubic root of 704561 is about 88.9828271373.

Adding to 704561 its reverse (165407), we get a palindrome (869968).

The spelling of 704561 in words is "seven hundred four thousand, five hundred sixty-one".