427971 has 4 divisors (see below), whose sum is σ = 570632. Its totient is φ = 285312.

The previous prime is 427969. The next prime is 427991. The reversal of 427971 is 179724.

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

It is not a de Polignac number, because 427971 - 2¹ = 427969 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427951) 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, 71326 + ... + 71331.

It is an arithmetic number, because the mean of its divisors is an integer number (142658).

2⁴²⁷⁹⁷¹ is an apocalyptic number.

427971 is a deficient number, since it is larger than the sum of its proper divisors (142661).

427971 is a wasteful number, since it uses less digits than its factorization.

427971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142660.

The product of its digits is 3528, while the sum is 30.

The square root of 427971 is about 654.1949250797. The cubic root of 427971 is about 75.3595183118.

The spelling of 427971 in words is "four hundred twenty-seven thousand, nine hundred seventy-one".