2403021 has 4 divisors (see below), whose sum is σ = 3204032. Its totient is φ = 1602012.

The previous prime is 2403019. The next prime is 2403029. The reversal of 2403021 is 1203042.

2403021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2403021 - 2¹ = 2403019 is a prime.

It is a D-number.

It is a Duffinian number.

2403021 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 2402988 and 2403006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400501 + ... + 400506.

It is an arithmetic number, because the mean of its divisors is an integer number (801008).

2^2403021 is an apocalyptic number.

It is an amenable number.

2403021 is a deficient number, since it is larger than the sum of its proper divisors (801011).

2403021 is an equidigital number, since it uses as much as digits as its factorization.

2403021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801010.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2403021 is about 1550.1680554056. The cubic root of 2403021 is about 133.9427430439.

Adding to 2403021 its reverse (1203042), we get a palindrome (3606063).

The spelling of 2403021 in words is "two million, four hundred three thousand, twenty-one".