421061129 has 2 divisors, whose sum is σ = 421061130. Its totient is φ = 421061128.

The previous prime is 421061099. The next prime is 421061167. The reversal of 421061129 is 921160124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419430400 + 1630729 = 20480^2 + 1277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421061129 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 421061098 and 421061107.

It is not a weakly prime, because it can be changed into another prime (421961129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210530564 + 210530565.

It is an arithmetic number, because the mean of its divisors is an integer number (210530565).

Almost surely, 2^421061129 is an apocalyptic number.

It is an amenable number.

421061129 is a deficient number, since it is larger than the sum of its proper divisors (1).

421061129 is an equidigital number, since it uses as much as digits as its factorization.

421061129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 421061129 is about 20519.7740971971. The cubic root of 421061129 is about 749.5173955980.

The spelling of 421061129 in words is "four hundred twenty-one million, sixty-one thousand, one hundred twenty-nine".