2154789 has 32 divisors (see below), whose sum is σ = 3933440. Its totient is φ = 1135296.

The previous prime is 2154749. The next prime is 2154791. The reversal of 2154789 is 9874512.

It is not a de Polignac number, because 2154789 - 2⁸ = 2154533 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2019 + ... + 2895.

It is an arithmetic number, because the mean of its divisors is an integer number (122920).

2^2154789 is an apocalyptic number.

It is an amenable number.

2154789 is a deficient number, since it is larger than the sum of its proper divisors (1778651).

2154789 is a wasteful number, since it uses less digits than its factorization.

2154789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 900 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 2154789 is about 1467.9199569459. The cubic root of 2154789 is about 129.1620462216.

The spelling of 2154789 in words is "two million, one hundred fifty-four thousand, seven hundred eighty-nine".