1024420421 has 2 divisors, whose sum is σ = 1024420422. Its totient is φ = 1024420420.

The previous prime is 1024420417. The next prime is 1024420427. The reversal of 1024420421 is 1240244201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527620900 + 496799521 = 22970^2 + 22289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1024420421 - 2² = 1024420417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1024420393 and 1024420402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1024420427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512210210 + 512210211.

It is an arithmetic number, because the mean of its divisors is an integer number (512210211).

Almost surely, 2^1024420421 is an apocalyptic number.

It is an amenable number.

1024420421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024420421 is an equidigital number, since it uses as much as digits as its factorization.

1024420421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1024420421 is about 32006.5684040011. The cubic root of 1024420421 is about 1008.0747630388.

Adding to 1024420421 its reverse (1240244201), we get a palindrome (2264664622).

The spelling of 1024420421 in words is "one billion, twenty-four million, four hundred twenty thousand, four hundred twenty-one".