2520403 has 8 divisors (see below), whose sum is σ = 2741472. Its totient is φ = 2307456.

The previous prime is 2520383. The next prime is 2520431. The reversal of 2520403 is 3040252.

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 2520403 - 2²¹ = 423251 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2520433) 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, 1375 + ... + 2632.

It is an arithmetic number, because the mean of its divisors is an integer number (342684).

2^2520403 is an apocalyptic number.

2520403 is a deficient number, since it is larger than the sum of its proper divisors (221069).

2520403 is a wasteful number, since it uses less digits than its factorization.

2520403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4061.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 2520403 is about 1587.5777146332. The cubic root of 2520403 is about 136.0890960306.

Adding to 2520403 its reverse (3040252), we get a palindrome (5560655).

The spelling of 2520403 in words is "two million, five hundred twenty thousand, four hundred three".