1006865 has 8 divisors (see below), whose sum is σ = 1213800. Its totient is φ = 801792.

The previous prime is 1006861. The next prime is 1006877. The reversal of 1006865 is 5686001.

It can be written as a sum of positive squares in 4 ways, for example, as 512656 + 494209 = 716^2 + 703^2 .

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 1006865 - 2² = 1006861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006861) 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, 1457 + ... + 2033.

It is an arithmetic number, because the mean of its divisors is an integer number (151725).

2^1006865 is an apocalyptic number.

It is an amenable number.

1006865 is a deficient number, since it is larger than the sum of its proper divisors (206935).

1006865 is an equidigital number, since it uses as much as digits as its factorization.

1006865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1006865 is about 1003.4266291065. The cubic root of 1006865 is about 100.2283116744.

The spelling of 1006865 in words is "one million, six thousand, eight hundred sixty-five".