420250001 has 2 divisors, whose sum is σ = 420250002. Its totient is φ = 420250000.

The previous prime is 420249971. The next prime is 420250003. The reversal of 420250001 is 100052024.

It is a Cunningham number, because it is equal to 20500²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420250000 + 1 = 20500^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420250001 is a prime.

It is a super-2 number, since 2×420250001² = 353220126681000002, which contains 22 as substring.

Together with 420250003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420250003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210125000 + 210125001.

It is an arithmetic number, because the mean of its divisors is an integer number (210125001).

Almost surely, 2^420250001 is an apocalyptic number.

It is an amenable number.

420250001 is a deficient number, since it is larger than the sum of its proper divisors (1).

420250001 is an equidigital number, since it uses as much as digits as its factorization.

420250001 is an evil number, because the sum of its binary digits is even.

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

The square root of 420250001 is about 20500.0000243902. Note that the first 4 decimals coincide. The cubic root of 420250001 is about 749.0357985817.

The spelling of 420250001 in words is "four hundred twenty million, two hundred fifty thousand, one".