716121 has 24 divisors (see below), whose sum is σ = 1228864. Its totient is φ = 408240.

The previous prime is 716117. The next prime is 716123. The reversal of 716121 is 121617.

It is not a de Polignac number, because 716121 - 2² = 716117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 716094 and 716103.

It is not an unprimeable number, because it can be changed into a prime (716123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1491 + ... + 1911.

2⁷¹⁶¹²¹ is an apocalyptic number.

It is an amenable number.

716121 is a deficient number, since it is larger than the sum of its proper divisors (512743).

716121 is an equidigital number, since it uses as much as digits as its factorization.

716121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 431 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 716121 is about 846.2393278500. The cubic root of 716121 is about 89.4668478902.

Adding to 716121 its reverse (121617), we get a palindrome (837738).

The spelling of 716121 in words is "seven hundred sixteen thousand, one hundred twenty-one".