420234324161 has 2 divisors, whose sum is σ = 420234324162. Its totient is φ = 420234324160.

The previous prime is 420234324157. The next prime is 420234324187. The reversal of 420234324161 is 161423432024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407503489600 + 12730834561 = 638360^2 + 112831^2 .

It is a cyclic number.

It is not a de Polignac number, because 420234324161 - 2² = 420234324157 is a prime.

It is not a weakly prime, because it can be changed into another prime (420234323161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210117162080 + 210117162081.

It is an arithmetic number, because the mean of its divisors is an integer number (210117162081).

Almost surely, 2^420234324161 is an apocalyptic number.

It is an amenable number.

420234324161 is a deficient number, since it is larger than the sum of its proper divisors (1).

420234324161 is an equidigital number, since it uses as much as digits as its factorization.

420234324161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 420234324161 its reverse (161423432024), we get a palindrome (581657756185).

The spelling of 420234324161 in words is "four hundred twenty billion, two hundred thirty-four million, three hundred twenty-four thousand, one hundred sixty-one".