424222129 has 2 divisors, whose sum is σ = 424222130. Its totient is φ = 424222128.

The previous prime is 424222111. The next prime is 424222163. The reversal of 424222129 is 921222424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415222129 + 9000000 = 20377^2 + 3000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424222129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 424222097 and 424222106.

It is not a weakly prime, because it can be changed into another prime (424222109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212111064 + 212111065.

It is an arithmetic number, because the mean of its divisors is an integer number (212111065).

Almost surely, 2^424222129 is an apocalyptic number.

It is an amenable number.

424222129 is a deficient number, since it is larger than the sum of its proper divisors (1).

424222129 is an equidigital number, since it uses as much as digits as its factorization.

424222129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 28.

The square root of 424222129 is about 20596.6533446577. The cubic root of 424222129 is about 751.3883197645.

It can be divided in two parts, 42422 and 2129, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 424222129 in words is "four hundred twenty-four million, two hundred twenty-two thousand, one hundred twenty-nine".