2022421 has 2 divisors, whose sum is σ = 2022422. Its totient is φ = 2022420.

The previous prime is 2022403. The next prime is 2022469. The reversal of 2022421 is 1242202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 790321 = 1110^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 2022421 - 2⁵ = 2022389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2022401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1011210 + 1011211.

It is an arithmetic number, because the mean of its divisors is an integer number (1011211).

2^2022421 is an apocalyptic number.

It is an amenable number.

2022421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2022421 is an equidigital number, since it uses as much as digits as its factorization.

2022421 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 13.

The square root of 2022421 is about 1422.1184901407. The cubic root of 2022421 is about 126.4611680191.

Adding to 2022421 its reverse (1242202), we get a palindrome (3264623).

The spelling of 2022421 in words is "two million, twenty-two thousand, four hundred twenty-one".