1424021 has 2 divisors, whose sum is σ = 1424022. Its totient is φ = 1424020.

The previous prime is 1423997. The next prime is 1424023. The reversal of 1424021 is 1204241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1416100 + 7921 = 1190^2 + 89^2 .

It is a cyclic number.

It is not a de Polignac number, because 1424021 - 2⁶ = 1423957 is a prime.

Together with 1424023, 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 = 1423987 and 1424005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1424023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712010 + 712011.

It is an arithmetic number, because the mean of its divisors is an integer number (712011).

2^1424021 is an apocalyptic number.

It is an amenable number.

1424021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1424021 is an equidigital number, since it uses as much as digits as its factorization.

1424021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1424021 is about 1193.3235102017. The cubic root of 1424021 is about 112.5050796060.

Adding to 1424021 its reverse (1204241), we get a palindrome (2628262).

The spelling of 1424021 in words is "one million, four hundred twenty-four thousand, twenty-one".