716426 has 4 divisors (see below), whose sum is σ = 1074642. Its totient is φ = 358212.

The previous prime is 716413. The next prime is 716447. The reversal of 716426 is 624617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624617 = 7 ⋅89231.

It can be written as a sum of positive squares in only one way, i.e., 714025 + 2401 = 845^2 + 49^2 .

It is a junction number, because it is equal to n+sod(n) for n = 716395 and 716404.

It is an unprimeable number.

716426 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 179105 + ... + 179108.

2⁷¹⁶⁴²⁶ is an apocalyptic number.

716426 is a deficient number, since it is larger than the sum of its proper divisors (358216).

716426 is a wasteful number, since it uses less digits than its factorization.

716426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358215.

The product of its digits is 2016, while the sum is 26.

The square root of 716426 is about 846.4195177334. The cubic root of 716426 is about 89.4795475669.

Subtracting from 716426 its reverse (624617), we obtain a square (91809 = 303²).

The spelling of 716426 in words is "seven hundred sixteen thousand, four hundred twenty-six".