1008865 has 32 divisors (see below), whose sum is σ = 1524096. Its totient is φ = 629760.

The previous prime is 1008863. The next prime is 1008871. The reversal of 1008865 is 5688001.

It is a happy number.

It is not a de Polignac number, because 1008865 - 2¹ = 1008863 is a prime.

It is a Duffinian number.

1008865 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1008863) 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 31 ways as a sum of consecutive naturals, for example, 12114 + ... + 12196.

It is an arithmetic number, because the mean of its divisors is an integer number (47628).

2^1008865 is an apocalyptic number.

It is an amenable number.

1008865 is a deficient number, since it is larger than the sum of its proper divisors (515231).

1008865 is a wasteful number, since it uses less digits than its factorization.

1008865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1008865 is about 1004.4227197749. The cubic root of 1008865 is about 100.2946310728.

It can be divided in two parts, 10088 and 65, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 1008865 in words is "one million, eight thousand, eight hundred sixty-five".