2124865 has 8 divisors (see below), whose sum is σ = 2684160. Its totient is φ = 1610352.

The previous prime is 2124853. The next prime is 2124869. The reversal of 2124865 is 5684212.

2124865 = 76² + 77² + ... + 189².

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 2124865 - 2¹¹ = 2122817 is a prime.

2124865 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2124869) 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 7 ways as a sum of consecutive naturals, for example, 11089 + ... + 11278.

It is an arithmetic number, because the mean of its divisors is an integer number (335520).

2^2124865 is an apocalyptic number.

It is an amenable number.

2124865 is a deficient number, since it is larger than the sum of its proper divisors (559295).

2124865 is a wasteful number, since it uses less digits than its factorization.

2124865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22391.

The product of its digits is 3840, while the sum is 28.

The square root of 2124865 is about 1457.6916683579. The cubic root of 2124865 is about 128.5613569418.

The spelling of 2124865 in words is "two million, one hundred twenty-four thousand, eight hundred sixty-five".