2154889 has 8 divisors (see below), whose sum is σ = 2371680. Its totient is φ = 1957780.

The previous prime is 2154881. The next prime is 2154899. The reversal of 2154889 is 9884512.

It is not a de Polignac number, because 2154889 - 2³ = 2154881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154881) 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, 522 + ... + 2140.

It is an arithmetic number, because the mean of its divisors is an integer number (296460).

2^2154889 is an apocalyptic number.

It is an amenable number.

2154889 is a deficient number, since it is larger than the sum of its proper divisors (216791).

2154889 is an equidigital number, since it uses as much as digits as its factorization.

2154889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1630 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 2154889 is about 1467.9540183534. The cubic root of 2154889 is about 129.1640442525.

The spelling of 2154889 in words is "two million, one hundred fifty-four thousand, eight hundred eighty-nine".