2154559 has 4 divisors (see below), whose sum is σ = 2350440. Its totient is φ = 1958680.

The previous prime is 2154553. The next prime is 2154577. The reversal of 2154559 is 9554512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2154559 - 2¹¹ = 2152511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2154559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97924 + ... + 97945.

It is an arithmetic number, because the mean of its divisors is an integer number (587610).

2^2154559 is an apocalyptic number.

2154559 is a deficient number, since it is larger than the sum of its proper divisors (195881).

2154559 is a wasteful number, since it uses less digits than its factorization.

2154559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195880.

The product of its digits is 9000, while the sum is 31.

The square root of 2154559 is about 1467.8416127089. The cubic root of 2154559 is about 129.1574505160.

It can be divided in two parts, 215 and 4559, that added together give a palindrome (4774).

The spelling of 2154559 in words is "two million, one hundred fifty-four thousand, five hundred fifty-nine".