705506 has 4 divisors (see below), whose sum is σ = 1058262. Its totient is φ = 352752.

The previous prime is 705499. The next prime is 705521. The reversal of 705506 is 605507.

705506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605507 = 7 ⋅86501.

It can be written as a sum of positive squares in only one way, i.e., 697225 + 8281 = 835^2 + 91^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176375 + ... + 176378.

2⁷⁰⁵⁵⁰⁶ is an apocalyptic number.

705506 is a deficient number, since it is larger than the sum of its proper divisors (352756).

705506 is a wasteful number, since it uses less digits than its factorization.

705506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352755.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 705506 is about 839.9440457554. The cubic root of 705506 is about 89.0225924213.

Subtracting from 705506 its reverse (605507), we obtain a palindrome (99999).

The spelling of 705506 in words is "seven hundred five thousand, five hundred six".