708121 has 4 divisors (see below), whose sum is σ = 710500. Its totient is φ = 705744.

The previous prime is 708119. The next prime is 708131. The reversal of 708121 is 121807.

708121 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: 121807 = 7 ⋅17401.

It can be written as a sum of positive squares in 2 ways, for example, as 640000 + 68121 = 800^2 + 261^2 .

It is a cyclic number.

It is not a de Polignac number, because 708121 - 2¹ = 708119 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (708131) 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, 666 + ... + 1363.

It is an arithmetic number, because the mean of its divisors is an integer number (177625).

2⁷⁰⁸¹²¹ is an apocalyptic number.

It is an amenable number.

708121 is a deficient number, since it is larger than the sum of its proper divisors (2379).

708121 is a wasteful number, since it uses less digits than its factorization.

708121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 708121 is about 841.4992572783. The cubic root of 708121 is about 89.1324459866.

Adding to 708121 its reverse (121807), we get a palindrome (829928).

The spelling of 708121 in words is "seven hundred eight thousand, one hundred twenty-one".