421285751 has 2 divisors, whose sum is σ = 421285752. Its totient is φ = 421285750.

The previous prime is 421285661. The next prime is 421285757. The reversal of 421285751 is 157582124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421285751 - 2¹⁸ = 421023607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421285757) 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, 210642875 + 210642876.

It is an arithmetic number, because the mean of its divisors is an integer number (210642876).

Almost surely, 2^421285751 is an apocalyptic number.

421285751 is a deficient number, since it is larger than the sum of its proper divisors (1).

421285751 is an equidigital number, since it uses as much as digits as its factorization.

421285751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 35.

The square root of 421285751 is about 20525.2466733046. The cubic root of 421285751 is about 749.6506527080.

The spelling of 421285751 in words is "four hundred twenty-one million, two hundred eighty-five thousand, seven hundred fifty-one".