1711681 has 4 divisors (see below), whose sum is σ = 1714372. Its totient is φ = 1708992.

The previous prime is 1711673. The next prime is 1711687. The reversal of 1711681 is 1861171.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1199025 + 512656 = 1095^2 + 716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1711681 - 2³ = 1711673 is a prime.

It is a super-2 number, since 2×1711681² = 5859703691522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1711687) 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, 205 + ... + 1861.

It is an arithmetic number, because the mean of its divisors is an integer number (428593).

2^1711681 is an apocalyptic number.

It is an amenable number.

1711681 is a deficient number, since it is larger than the sum of its proper divisors (2691).

1711681 is a wasteful number, since it uses less digits than its factorization.

1711681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690.

The product of its digits is 336, while the sum is 25.

The square root of 1711681 is about 1308.3122715927. The cubic root of 1711681 is about 119.6210499371.

The spelling of 1711681 in words is "one million, seven hundred eleven thousand, six hundred eighty-one".