705381 has 8 divisors (see below), whose sum is σ = 995904. Its totient is φ = 442560.

The previous prime is 705317. The next prime is 705389. The reversal of 705381 is 183507.

705381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 705381 - 2⁶ = 705317 is a prime.

It is a super-4 number, since 4×705381⁴ (a number of 24 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

705381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6865 + ... + 6966.

It is an arithmetic number, because the mean of its divisors is an integer number (124488).

2⁷⁰⁵³⁸¹ is an apocalyptic number.

It is an amenable number.

705381 is a deficient number, since it is larger than the sum of its proper divisors (290523).

705381 is a wasteful number, since it uses less digits than its factorization.

705381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13851.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 705381 is about 839.8696327407. The cubic root of 705381 is about 89.0173345018.

Adding to 705381 its reverse (183507), we get a palindrome (888888).

The spelling of 705381 in words is "seven hundred five thousand, three hundred eighty-one".