705121 has 4 divisors (see below), whose sum is σ = 711700. Its totient is φ = 698544.

The previous prime is 705119. The next prime is 705127. The reversal of 705121 is 121507.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 230400 + 474721 = 480^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 705121 - 2¹ = 705119 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 705095 and 705104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705127) 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, 3126 + ... + 3343.

It is an arithmetic number, because the mean of its divisors is an integer number (177925).

2⁷⁰⁵¹²¹ is an apocalyptic number.

It is an amenable number.

705121 is a deficient number, since it is larger than the sum of its proper divisors (6579).

705121 is a wasteful number, since it uses less digits than its factorization.

705121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6578.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 705121 is about 839.7148325473. The cubic root of 705121 is about 89.0063960391.

Adding to 705121 its reverse (121507), we get a palindrome (826628).

The spelling of 705121 in words is "seven hundred five thousand, one hundred twenty-one".