422860421 has 2 divisors, whose sum is σ = 422860422. Its totient is φ = 422860420.

The previous prime is 422860387. The next prime is 422860483. The reversal of 422860421 is 124068224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 292581025 + 130279396 = 17105^2 + 11414^2 .

It is a cyclic number.

It is not a de Polignac number, because 422860421 - 2¹⁸ = 422598277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422860621) 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, 211430210 + 211430211.

It is an arithmetic number, because the mean of its divisors is an integer number (211430211).

Almost surely, 2^422860421 is an apocalyptic number.

It is an amenable number.

422860421 is a deficient number, since it is larger than the sum of its proper divisors (1).

422860421 is an equidigital number, since it uses as much as digits as its factorization.

422860421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 422860421 is about 20563.5702396252. The cubic root of 422860421 is about 750.5834991058.

The spelling of 422860421 in words is "four hundred twenty-two million, eight hundred sixty thousand, four hundred twenty-one".