702521 has 4 divisors (see below), whose sum is σ = 708852. Its totient is φ = 696192.

The previous prime is 702517. The next prime is 702523. The reversal of 702521 is 125207.

702521 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.

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 490000 = 461^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 702521 - 2² = 702517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 702521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (702523) 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, 2996 + ... + 3221.

It is an arithmetic number, because the mean of its divisors is an integer number (177213).

2⁷⁰²⁵²¹ is an apocalyptic number.

It is an amenable number.

702521 is a deficient number, since it is larger than the sum of its proper divisors (6331).

702521 is a wasteful number, since it uses less digits than its factorization.

702521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6330.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 702521 is about 838.1652581681. The cubic root of 702521 is about 88.8968632313.

Adding to 702521 its reverse (125207), we get a palindrome (827728).

The spelling of 702521 in words is "seven hundred two thousand, five hundred twenty-one".