2150865 has 12 divisors (see below), whose sum is σ = 3728244. Its totient is φ = 1147104.

The previous prime is 2150849. The next prime is 2150867. The reversal of 2150865 is 5680512.

It can be written as a sum of positive squares in 2 ways, for example, as 898704 + 1252161 = 948^2 + 1119^2 .

It is not a de Polignac number, because 2150865 - 2⁴ = 2150849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2150867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23854 + ... + 23943.

It is an arithmetic number, because the mean of its divisors is an integer number (310687).

2^2150865 is an apocalyptic number.

It is an amenable number.

2150865 is a deficient number, since it is larger than the sum of its proper divisors (1577379).

2150865 is a wasteful number, since it uses less digits than its factorization.

2150865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47808 (or 47805 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2150865 is about 1466.5827627516. The cubic root of 2150865 is about 129.0835946364.

The spelling of 2150865 in words is "two million, one hundred fifty thousand, eight hundred sixty-five".