420006287 has 2 divisors, whose sum is σ = 420006288. Its totient is φ = 420006286.

The previous prime is 420006269. The next prime is 420006313. The reversal of 420006287 is 782600024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420006287 - 2¹⁴ = 419989903 is a prime.

It is a super-2 number, since 2×420006287² = 352810562239052738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420006227) 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, 210003143 + 210003144.

It is an arithmetic number, because the mean of its divisors is an integer number (210003144).

Almost surely, 2^420006287 is an apocalyptic number.

420006287 is a deficient number, since it is larger than the sum of its proper divisors (1).

420006287 is an equidigital number, since it uses as much as digits as its factorization.

420006287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 420006287 is about 20494.0549184392. The cubic root of 420006287 is about 748.8909754128.

The spelling of 420006287 in words is "four hundred twenty million, six thousand, two hundred eighty-seven".