2145403 has 8 divisors (see below), whose sum is σ = 2340800. Its totient is φ = 1954368.

The previous prime is 2145401. The next prime is 2145421. The reversal of 2145403 is 3045412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2145403 - 2¹ = 2145401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145401) 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, 18 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (292600).

2^2145403 is an apocalyptic number.

2145403 is a deficient number, since it is larger than the sum of its proper divisors (195397).

2145403 is a wasteful number, since it uses less digits than its factorization.

2145403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181.

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

The square root of 2145403 is about 1464.7194270576. The cubic root of 2145403 is about 128.9742351845.

Subtracting 2145403 from its reverse (3045412), we obtain a palindrome (900009).

The spelling of 2145403 in words is "two million, one hundred forty-five thousand, four hundred three".