2154189 has 8 divisors (see below), whose sum is σ = 3041280. Its totient is φ = 1351616.

The previous prime is 2154169. The next prime is 2154193. The reversal of 2154189 is 9814512.

It is a happy number.

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 2154189 - 2¹⁷ = 2023117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154109) 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, 21069 + ... + 21170.

It is an arithmetic number, because the mean of its divisors is an integer number (380160).

2^2154189 is an apocalyptic number.

It is an amenable number.

2154189 is a deficient number, since it is larger than the sum of its proper divisors (887091).

2154189 is a wasteful number, since it uses less digits than its factorization.

2154189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42259.

The product of its digits is 2880, while the sum is 30.

The square root of 2154189 is about 1467.7155719008. The cubic root of 2154189 is about 129.1500567380.

The spelling of 2154189 in words is "two million, one hundred fifty-four thousand, one hundred eighty-nine".