705243 has 32 divisors (see below), whose sum is σ = 1216512. Its totient is φ = 352800.

The previous prime is 705209. The next prime is 705247. The reversal of 705243 is 342507.

It is a happy number.

It is not a de Polignac number, because 705243 - 2⁹ = 704731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

705243 is a Rhonda number in base 8.

It is not an unprimeable number, because it can be changed into a prime (705247) 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 31 ways as a sum of consecutive naturals, for example, 9898 + ... + 9968.

It is an arithmetic number, because the mean of its divisors is an integer number (38016).

2⁷⁰⁵²⁴³ is an apocalyptic number.

705243 is a deficient number, since it is larger than the sum of its proper divisors (511269).

705243 is a wasteful number, since it uses less digits than its factorization.

705243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 705243 is about 839.7874731145. The cubic root of 705243 is about 89.0115290371.

The spelling of 705243 in words is "seven hundred five thousand, two hundred forty-three".