1868865 has 16 divisors (see below), whose sum is σ = 3120768. Its totient is φ = 953216.

The previous prime is 1868863. The next prime is 1868879. The reversal of 1868865 is 5688681.

It is a cyclic number.

It is not a de Polignac number, because 1868865 - 2¹ = 1868863 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2364 + ... + 3053.

It is an arithmetic number, because the mean of its divisors is an integer number (195048).

2^1868865 is an apocalyptic number.

1868865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1868865 is a deficient number, since it is larger than the sum of its proper divisors (1251903).

1868865 is a wasteful number, since it uses less digits than its factorization.

1868865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448.

The product of its digits is 92160, while the sum is 42.

The square root of 1868865 is about 1367.0643730271. The cubic root of 1868865 is about 123.1759659996.

The spelling of 1868865 in words is "one million, eight hundred sixty-eight thousand, eight hundred sixty-five".