711881 has 4 divisors (see below), whose sum is σ = 714000. Its totient is φ = 709764.

The previous prime is 711877. The next prime is 711889. The reversal of 711881 is 188117.

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, and also an emirpimes, since its reverse is a distinct semiprime: 188117 = 23 ⋅8179.

It is a cyclic number.

It is not a de Polignac number, because 711881 - 2² = 711877 is a prime.

It is a super-2 number, since 2×711881² = 1013549116322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 711881.

It is not an unprimeable number, because it can be changed into a prime (711889) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 431 + ... + 1268.

It is an arithmetic number, because the mean of its divisors is an integer number (178500).

2⁷¹¹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

711881 is a deficient number, since it is larger than the sum of its proper divisors (2119).

711881 is a wasteful number, since it uses less digits than its factorization.

711881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118.

The product of its digits is 448, while the sum is 26.

The square root of 711881 is about 843.7304071799. The cubic root of 711881 is about 89.2899268717.

Adding to 711881 its reverse (188117), we get a palindrome (899998).

The spelling of 711881 in words is "seven hundred eleven thousand, eight hundred eighty-one".