427561 has 4 divisors (see below), whose sum is σ = 433492. Its totient is φ = 421632.

The previous prime is 427541. The next prime is 427579. The reversal of 427561 is 165724.

427561 is nontrivially palindromic in base 8.

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 337561 + 90000 = 581^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 427561 - 2⁵ = 427529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2856 + ... + 3001.

It is an arithmetic number, because the mean of its divisors is an integer number (108373).

2⁴²⁷⁵⁶¹ is an apocalyptic number.

It is an amenable number.

427561 is a deficient number, since it is larger than the sum of its proper divisors (5931).

427561 is an equidigital number, since it uses as much as digits as its factorization.

427561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5930.

The product of its digits is 1680, while the sum is 25.

The square root of 427561 is about 653.8814877331. The cubic root of 427561 is about 75.3354455947.

The spelling of 427561 in words is "four hundred twenty-seven thousand, five hundred sixty-one".