2154403 has 4 divisors (see below), whose sum is σ = 2164288. Its totient is φ = 2144520.

The previous prime is 2154389. The next prime is 2154413. The reversal of 2154403 is 3044512.

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 2154403 - 2⁹ = 2153891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154413) 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, 4608 + ... + 5053.

It is an arithmetic number, because the mean of its divisors is an integer number (541072).

2^2154403 is an apocalyptic number.

2154403 is a deficient number, since it is larger than the sum of its proper divisors (9885).

2154403 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 9 representation: 2154403 = (4043251)₉.

2154403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9884.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2154403 is about 1467.7884724987. The cubic root of 2154403 is about 129.1543332425.

Adding to 2154403 its reverse (3044512), we get a palindrome (5198915).

The spelling of 2154403 in words is "two million, one hundred fifty-four thousand, four hundred three".