2154843 has 20 divisors (see below), whose sum is σ = 3310560. Its totient is φ = 1395792.

The previous prime is 2154839. The next prime is 2154851. The reversal of 2154843 is 3484512.

It is not a de Polignac number, because 2154843 - 2² = 2154839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (3840) is a multiple of the sum of its prime factors (768).

It is not an unprimeable number, because it can be changed into a prime (2154853) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2638 + ... + 3356.

It is an arithmetic number, because the mean of its divisors is an integer number (165528).

2^2154843 is an apocalyptic number.

2154843 is a deficient number, since it is larger than the sum of its proper divisors (1155717).

2154843 is an equidigital number, since it uses as much as digits as its factorization.

2154843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 759 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 2154843 is about 1467.9383502041. The cubic root of 2154843 is about 129.1631251659.

The spelling of 2154843 in words is "two million, one hundred fifty-four thousand, eight hundred forty-three".