825427 has 4 divisors (see below), whose sum is σ = 853920. Its totient is φ = 796936.

The previous prime is 825421. The next prime is 825439. The reversal of 825427 is 724528.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825427 is a prime.

It is a Duffinian number.

825427 is a lucky number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 825395 and 825404.

It is not an unprimeable number, because it can be changed into a prime (825421) 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, 14203 + ... + 14260.

It is an arithmetic number, because the mean of its divisors is an integer number (213480).

2⁸²⁵⁴²⁷ is an apocalyptic number.

825427 is a deficient number, since it is larger than the sum of its proper divisors (28493).

825427 is a wasteful number, since it uses less digits than its factorization.

825427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28492.

The product of its digits is 4480, while the sum is 28.

The square root of 825427 is about 908.5301315862. The cubic root of 825427 is about 93.8050509265.

It can be divided in two parts, 8254 and 27, that added together give a square (8281 = 91²).

The spelling of 825427 in words is "eight hundred twenty-five thousand, four hundred twenty-seven".