427118561 has 4 divisors (see below), whose sum is σ = 428105412. Its totient is φ = 426131712.

The previous prime is 427118521. The next prime is 427118569. The reversal of 427118561 is 165811724.

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 182790400 + 244328161 = 13520^2 + 15631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427118561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (427118569) 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 in 3 ways as a sum of consecutive naturals, for example, 492776 + ... + 493641.

It is an arithmetic number, because the mean of its divisors is an integer number (107026353).

Almost surely, 2^427118561 is an apocalyptic number.

It is an amenable number.

427118561 is a deficient number, since it is larger than the sum of its proper divisors (986851).

427118561 is an equidigital number, since it uses as much as digits as its factorization.

427118561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986850.

The product of its digits is 13440, while the sum is 35.

The square root of 427118561 is about 20666.8469051280. The cubic root of 427118561 is about 753.0945098588.

The spelling of 427118561 in words is "four hundred twenty-seven million, one hundred eighteen thousand, five hundred sixty-one".