424034021 has 2 divisors, whose sum is σ = 424034022. Its totient is φ = 424034020.

The previous prime is 424033991. The next prime is 424034041. The reversal of 424034021 is 120430424.

It is an a-pointer prime, because the next prime (424034041) can be obtained adding 424034021 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419020900 + 5013121 = 20470^2 + 2239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424034021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 424033984 and 424034002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424034041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212017010 + 212017011.

It is an arithmetic number, because the mean of its divisors is an integer number (212017011).

Almost surely, 2^424034021 is an apocalyptic number.

It is an amenable number.

424034021 is a deficient number, since it is larger than the sum of its proper divisors (1).

424034021 is an equidigital number, since it uses as much as digits as its factorization.

424034021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 424034021 is about 20592.0863683115. The cubic root of 424034021 is about 751.2772434826.

Adding to 424034021 its reverse (120430424), we get a palindrome (544464445).

The spelling of 424034021 in words is "four hundred twenty-four million, thirty-four thousand, twenty-one".