420251207 has 2 divisors, whose sum is σ = 420251208. Its totient is φ = 420251206.

The previous prime is 420251191. The next prime is 420251231. The reversal of 420251207 is 702152024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420251207 - 2⁴ = 420251191 is a prime.

It is a super-2 number, since 2×420251207² = 353222153969913698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420251287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210125603 + 210125604.

It is an arithmetic number, because the mean of its divisors is an integer number (210125604).

Almost surely, 2^420251207 is an apocalyptic number.

420251207 is a deficient number, since it is larger than the sum of its proper divisors (1).

420251207 is an equidigital number, since it uses as much as digits as its factorization.

420251207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 420251207 is about 20500.0294390033. The cubic root of 420251207 is about 749.0365150887.

The spelling of 420251207 in words is "four hundred twenty million, two hundred fifty-one thousand, two hundred seven".