425871 has 8 divisors (see below), whose sum is σ = 630960. Its totient is φ = 283896.

The previous prime is 425869. The next prime is 425879. The reversal of 425871 is 178524.

It is not a de Polignac number, because 425871 - 2¹ = 425869 is a prime.

It is a super-2 number, since 2×425871² = 362732217282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 15773 = 425871 / (4 + 2 + 5 + 8 + 7 + 1).

It is an Ulam number.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425871.

It is not an unprimeable number, because it can be changed into a prime (425879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7860 + ... + 7913.

It is an arithmetic number, because the mean of its divisors is an integer number (78870).

2⁴²⁵⁸⁷¹ is an apocalyptic number.

425871 is a deficient number, since it is larger than the sum of its proper divisors (205089).

425871 is a wasteful number, since it uses less digits than its factorization.

425871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15782 (or 15776 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 425871 is about 652.5879251105. The cubic root of 425871 is about 75.2360562531.

It can be divided in two parts, 425 and 871, that added together give a 4-th power (1296 = 6⁴).

The spelling of 425871 in words is "four hundred twenty-five thousand, eight hundred seventy-one".