2423021 has 2 divisors, whose sum is σ = 2423022. Its totient is φ = 2423020.

The previous prime is 2422999. The next prime is 2423023. The reversal of 2423021 is 1203242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1876900 + 546121 = 1370^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 2423021 - 2⁶ = 2422957 is a prime.

Together with 2423023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2422987 and 2423005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2423023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1211510 + 1211511.

It is an arithmetic number, because the mean of its divisors is an integer number (1211511).

2^2423021 is an apocalyptic number.

It is an amenable number.

2423021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2423021 is an equidigital number, since it uses as much as digits as its factorization.

2423021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2423021 is about 1556.6056019429. The cubic root of 2423021 is about 134.3133123018.

Adding to 2423021 its reverse (1203242), we get a palindrome (3626263).

The spelling of 2423021 in words is "two million, four hundred twenty-three thousand, twenty-one".