421275065 has 4 divisors (see below), whose sum is σ = 505530084. Its totient is φ = 337020048.

The previous prime is 421275059. The next prime is 421275073. The reversal of 421275065 is 560572124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132411049 + 288864016 = 11507^2 + 16996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421275065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42127502 + ... + 42127511.

It is an arithmetic number, because the mean of its divisors is an integer number (126382521).

Almost surely, 2^421275065 is an apocalyptic number.

It is an amenable number.

421275065 is a deficient number, since it is larger than the sum of its proper divisors (84255019).

421275065 is an equidigital number, since it uses as much as digits as its factorization.

421275065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84255018.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 421275065 is about 20524.9863580953. The cubic root of 421275065 is about 749.6443143065.

The spelling of 421275065 in words is "four hundred twenty-one million, two hundred seventy-five thousand, sixty-five".