2154865 has 8 divisors (see below), whose sum is σ = 2593728. Its totient is φ = 1718640.

The previous prime is 2154853. The next prime is 2154871. The reversal of 2154865 is 5684512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2154865 - 2¹¹ = 2152817 is a prime.

It is a Duffinian number.

2154865 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2814 + ... + 3496.

It is an arithmetic number, because the mean of its divisors is an integer number (324216).

2^2154865 is an apocalyptic number.

It is an amenable number.

2154865 is a deficient number, since it is larger than the sum of its proper divisors (438863).

2154865 is an equidigital number, since it uses as much as digits as its factorization.

2154865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319.

The product of its digits is 9600, while the sum is 31.

The square root of 2154865 is about 1467.9458436877. The cubic root of 2154865 is about 129.1635647307.

The spelling of 2154865 in words is "two million, one hundred fifty-four thousand, eight hundred sixty-five".