2154005 has 8 divisors (see below), whose sum is σ = 2954112. Its totient is φ = 1477008.

The previous prime is 2153993. The next prime is 2154007. The reversal of 2154005 is 5004512.

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 2154005 - 2⁴ = 2153989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30737 + ... + 30806.

It is an arithmetic number, because the mean of its divisors is an integer number (369264).

2^2154005 is an apocalyptic number.

It is an amenable number.

2154005 is a deficient number, since it is larger than the sum of its proper divisors (800107).

2154005 is an equidigital number, since it uses as much as digits as its factorization.

2154005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61555.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2154005 is about 1467.6528881176. The cubic root of 2154005 is about 129.1463795170.

Adding to 2154005 its reverse (5004512), we get a palindrome (7158517).

The spelling of 2154005 in words is "two million, one hundred fifty-four thousand, five".