718261 has 4 divisors (see below), whose sum is σ = 721132. Its totient is φ = 715392.

The previous prime is 718259. The next prime is 718271. The reversal of 718261 is 162817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162817 = 23 ⋅7079.

It can be written as a sum of positive squares in 2 ways, for example, as 269361 + 448900 = 519^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 718261 - 2¹ = 718259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (718241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (180283).

2⁷¹⁸²⁶¹ is an apocalyptic number.

It is an amenable number.

718261 is a deficient number, since it is larger than the sum of its proper divisors (2871).

718261 is a wasteful number, since it uses less digits than its factorization.

718261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870.

The product of its digits is 672, while the sum is 25.

The square root of 718261 is about 847.5028023552. The cubic root of 718261 is about 89.5558778431. Note that the first 3 decimals are identical.

It can be divided in two parts, 718 and 261, that added together give a palindrome (979).

The spelling of 718261 in words is "seven hundred eighteen thousand, two hundred sixty-one".