1718641 has 4 divisors (see below), whose sum is σ = 1725300. Its totient is φ = 1711984.

The previous prime is 1718599. The next prime is 1718653. The reversal of 1718641 is 1468171.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41616 + 1677025 = 204^2 + 1295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1718641 - 2¹⁷ = 1587569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1718141) 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, 2926 + ... + 3463.

It is an arithmetic number, because the mean of its divisors is an integer number (431325).

2^1718641 is an apocalyptic number.

It is an amenable number.

1718641 is a deficient number, since it is larger than the sum of its proper divisors (6659).

1718641 is an equidigital number, since it uses as much as digits as its factorization.

1718641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6658.

The product of its digits is 1344, while the sum is 28.

The square root of 1718641 is about 1310.9694885847. The cubic root of 1718641 is about 119.7829641802.

The spelling of 1718641 in words is "one million, seven hundred eighteen thousand, six hundred forty-one".