420002501 has 2 divisors, whose sum is σ = 420002502. Its totient is φ = 420002500.

The previous prime is 420002497. The next prime is 420002537. The reversal of 420002501 is 105200024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 403608100 + 16394401 = 20090^2 + 4049^2 .

It is a cyclic number.

It is not a de Polignac number, because 420002501 - 2² = 420002497 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420002591) 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, 210001250 + 210001251.

It is an arithmetic number, because the mean of its divisors is an integer number (210001251).

Almost surely, 2^420002501 is an apocalyptic number.

It is an amenable number.

420002501 is a deficient number, since it is larger than the sum of its proper divisors (1).

420002501 is an equidigital number, since it uses as much as digits as its factorization.

420002501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 420002501 is about 20493.9625499804. The cubic root of 420002501 is about 748.8887252006. Note that the first 3 decimals are identical.

Adding to 420002501 its reverse (105200024), we get a palindrome (525202525).

The spelling of 420002501 in words is "four hundred twenty million, two thousand, five hundred one".