708521 has 8 divisors (see below), whose sum is σ = 792288. Its totient is φ = 628000.

The previous prime is 708517. The next prime is 708527. The reversal of 708521 is 125807.

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

It is a cyclic number.

It is not a de Polignac number, because 708521 - 2² = 708517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (708527) 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, 335 + ... + 1236.

It is an arithmetic number, because the mean of its divisors is an integer number (99036).

2⁷⁰⁸⁵²¹ is an apocalyptic number.

It is an amenable number.

708521 is a deficient number, since it is larger than the sum of its proper divisors (83767).

708521 is a wasteful number, since it uses less digits than its factorization.

708521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 708521 is about 841.7368947599. The cubic root of 708521 is about 89.1492257306.

It can be divided in two parts, 7085 and 21, that multiplied together give a triangular number (148785 = T₅₄₅).

The spelling of 708521 in words is "seven hundred eight thousand, five hundred twenty-one".