420131441 has 2 divisors, whose sum is σ = 420131442. Its totient is φ = 420131440.

The previous prime is 420131429. The next prime is 420131443. The reversal of 420131441 is 144131024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417793600 + 2337841 = 20440^2 + 1529^2 .

It is a cyclic number.

It is not a de Polignac number, because 420131441 - 2¹⁸ = 419869297 is a prime.

It is a Sophie Germain prime.

Together with 420131443, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (420131443) 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, 210065720 + 210065721.

It is an arithmetic number, because the mean of its divisors is an integer number (210065721).

Almost surely, 2^420131441 is an apocalyptic number.

It is an amenable number.

420131441 is a deficient number, since it is larger than the sum of its proper divisors (1).

420131441 is an equidigital number, since it uses as much as digits as its factorization.

420131441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 420131441 is about 20497.1081130973. The cubic root of 420131441 is about 748.9653531828.

Adding to 420131441 its reverse (144131024), we get a palindrome (564262465).

The spelling of 420131441 in words is "four hundred twenty million, one hundred thirty-one thousand, four hundred forty-one".