705557 has 4 divisors (see below), whose sum is σ = 712140. Its totient is φ = 698976.

The previous prime is 705533. The next prime is 705559. The reversal of 705557 is 755507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755507 = 41 ⋅18427.

It can be written as a sum of positive squares in 2 ways, for example, as 303601 + 401956 = 551^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 705557 - 2⁶ = 705493 is a prime.

It is a super-3 number, since 3×705557³ = 1053701430373331079, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705559) 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, 3128 + ... + 3345.

It is an arithmetic number, because the mean of its divisors is an integer number (178035).

2⁷⁰⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

705557 is a deficient number, since it is larger than the sum of its proper divisors (6583).

705557 is a wasteful number, since it uses less digits than its factorization.

705557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6582.

The product of its (nonzero) digits is 6125, while the sum is 29.

The square root of 705557 is about 839.9744043719. The cubic root of 705557 is about 89.0247374741.

The spelling of 705557 in words is "seven hundred five thousand, five hundred fifty-seven".