705641 has 4 divisors (see below), whose sum is σ = 742800. Its totient is φ = 668484.

The previous prime is 705631. The next prime is 705643. The reversal of 705641 is 146507.

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: 146507 = 239 ⋅613.

It is a cyclic number.

It is not a de Polignac number, because 705641 - 2¹⁰ = 704617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (705643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18551 + ... + 18588.

It is an arithmetic number, because the mean of its divisors is an integer number (185700).

2⁷⁰⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

705641 is a deficient number, since it is larger than the sum of its proper divisors (37159).

705641 is a wasteful number, since it uses less digits than its factorization.

705641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37158.

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

The square root of 705641 is about 840.0244044074. The cubic root of 705641 is about 89.0282702768.

The spelling of 705641 in words is "seven hundred five thousand, six hundred forty-one".