421020701 has 2 divisors, whose sum is σ = 421020702. Its totient is φ = 421020700.

The previous prime is 421020679. The next prime is 421020707. The reversal of 421020701 is 107020124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419184676 + 1836025 = 20474^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 421020701 - 2¹⁴ = 421004317 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421020701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421020707) 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, 210510350 + 210510351.

It is an arithmetic number, because the mean of its divisors is an integer number (210510351).

Almost surely, 2^421020701 is an apocalyptic number.

It is an amenable number.

421020701 is a deficient number, since it is larger than the sum of its proper divisors (1).

421020701 is an equidigital number, since it uses as much as digits as its factorization.

421020701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 421020701 is about 20518.7889749858. The cubic root of 421020701 is about 749.4934066353.

Adding to 421020701 its reverse (107020124), we get a palindrome (528040825).

The spelling of 421020701 in words is "four hundred twenty-one million, twenty thousand, seven hundred one".