2431021 has 4 divisors (see below), whose sum is σ = 2439612. Its totient is φ = 2422432.

The previous prime is 2431007. The next prime is 2431049. The reversal of 2431021 is 1201342.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2368521 + 62500 = 1539^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2431021 - 2¹³ = 2422829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2430992 and 2431010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2431061) 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, 3856 + ... + 4441.

It is an arithmetic number, because the mean of its divisors is an integer number (609903).

2^2431021 is an apocalyptic number.

It is an amenable number.

2431021 is a deficient number, since it is larger than the sum of its proper divisors (8591).

2431021 is an equidigital number, since it uses as much as digits as its factorization.

2431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8590.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2431021 is about 1559.1731783224. The cubic root of 2431021 is about 134.4609690369.

Adding to 2431021 its reverse (1201342), we get a palindrome (3632363).

The spelling of 2431021 in words is "two million, four hundred thirty-one thousand, twenty-one".