2402021 has 8 divisors (see below), whose sum is σ = 2459160. Its totient is φ = 2345728.

The previous prime is 2402009. The next prime is 2402027. The reversal of 2402021 is 1202042.

2402021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 748225 + 1653796 = 865^2 + 1286^2 .

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 2402021 - 2¹⁴ = 2385637 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 2401993 and 2402011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2402027) 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 7 ways as a sum of consecutive naturals, for example, 12095 + ... + 12291.

It is an arithmetic number, because the mean of its divisors is an integer number (307395).

2^2402021 is an apocalyptic number.

It is an amenable number.

2402021 is a deficient number, since it is larger than the sum of its proper divisors (57139).

2402021 is a wasteful number, since it uses less digits than its factorization.

2402021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2402021 is about 1549.8454761685. The cubic root of 2402021 is about 133.9241606945.

Adding to 2402021 its reverse (1202042), we get a palindrome (3604063).

The spelling of 2402021 in words is "two million, four hundred two thousand, twenty-one".