1868665 has 8 divisors (see below), whose sum is σ = 2251080. Its totient is φ = 1489152.

The previous prime is 1868663. The next prime is 1868677. The reversal of 1868665 is 5668681.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29929 + 1838736 = 173^2 + 1356^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1868665 - 2¹ = 1868663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1868663) 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 7 ways as a sum of consecutive naturals, for example, 1131 + ... + 2239.

It is an arithmetic number, because the mean of its divisors is an integer number (281385).

2^1868665 is an apocalyptic number.

It is an amenable number.

1868665 is a deficient number, since it is larger than the sum of its proper divisors (382415).

1868665 is a wasteful number, since it uses less digits than its factorization.

1868665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451.

The product of its digits is 69120, while the sum is 40.

The square root of 1868665 is about 1366.9912216251. The cubic root of 1868665 is about 123.1715718759.

The spelling of 1868665 in words is "one million, eight hundred sixty-eight thousand, six hundred sixty-five".