421516775 has 12 divisors (see below), whose sum is σ = 523004472. Its totient is φ = 337004640.

The previous prime is 421516741. The next prime is 421516789. The reversal of 421516775 is 577615124.

It is not a de Polignac number, because 421516775 - 2¹⁰ = 421515751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45704 + ... + 54146.

It is an arithmetic number, because the mean of its divisors is an integer number (43583706).

Almost surely, 2^421516775 is an apocalyptic number.

421516775 is a deficient number, since it is larger than the sum of its proper divisors (101487697).

421516775 is a wasteful number, since it uses less digits than its factorization.

421516775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10450 (or 10445 counting only the distinct ones).

The product of its digits is 58800, while the sum is 38.

The square root of 421516775 is about 20530.8737027921. The cubic root of 421516775 is about 749.7876584056.

The spelling of 421516775 in words is "four hundred twenty-one million, five hundred sixteen thousand, seven hundred seventy-five".