710921 has 4 divisors (see below), whose sum is σ = 720000. Its totient is φ = 701844.

The previous prime is 710917. The next prime is 710929. The reversal of 710921 is 129017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 710921 - 2² = 710917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 710893 and 710902.

It is not an unprimeable number, because it can be changed into a prime (710929) 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, 4421 + ... + 4578.

It is an arithmetic number, because the mean of its divisors is an integer number (180000).

2⁷¹⁰⁹²¹ is an apocalyptic number.

It is an amenable number.

710921 is a deficient number, since it is larger than the sum of its proper divisors (9079).

710921 is an equidigital number, since it uses as much as digits as its factorization.

710921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9078.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 710921 is about 843.1613131543. The cubic root of 710921 is about 89.2497718036.

Adding to 710921 its reverse (129017), we get a palindrome (839938).

The spelling of 710921 in words is "seven hundred ten thousand, nine hundred twenty-one".