421507259 has 2 divisors, whose sum is σ = 421507260. Its totient is φ = 421507258.

The previous prime is 421507243. The next prime is 421507277. The reversal of 421507259 is 952705124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421507259 - 2⁴ = 421507243 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (421507159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210753629 + 210753630.

It is an arithmetic number, because the mean of its divisors is an integer number (210753630).

Almost surely, 2^421507259 is an apocalyptic number.

421507259 is a deficient number, since it is larger than the sum of its proper divisors (1).

421507259 is an equidigital number, since it uses as much as digits as its factorization.

421507259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 421507259 is about 20530.6419529444. The cubic root of 421507259 is about 749.7820160575.

The spelling of 421507259 in words is "four hundred twenty-one million, five hundred seven thousand, two hundred fifty-nine".