421072801 has 2 divisors, whose sum is σ = 421072802. Its totient is φ = 421072800.

The previous prime is 421072787. The next prime is 421072811. The reversal of 421072801 is 108270124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421070400 + 2401 = 20520^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 421072801 - 2¹¹ = 421070753 is a prime.

It is not a weakly prime, because it can be changed into another prime (421072811) 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, 210536400 + 210536401.

It is an arithmetic number, because the mean of its divisors is an integer number (210536401).

Almost surely, 2^421072801 is an apocalyptic number.

It is an amenable number.

421072801 is a deficient number, since it is larger than the sum of its proper divisors (1).

421072801 is an equidigital number, since it uses as much as digits as its factorization.

421072801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 421072801 is about 20520.0585038152. The cubic root of 421072801 is about 749.5243211848.

The spelling of 421072801 in words is "four hundred twenty-one million, seventy-two thousand, eight hundred one".