825142 has 4 divisors (see below), whose sum is σ = 1237716. Its totient is φ = 412570.

The previous prime is 825131. The next prime is 825161. The reversal of 825142 is 241528.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

825142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206284 + ... + 206287.

It is an arithmetic number, because the mean of its divisors is an integer number (309429).

2⁸²⁵¹⁴² is an apocalyptic number.

825142 is a deficient number, since it is larger than the sum of its proper divisors (412574).

825142 is a wasteful number, since it uses less digits than its factorization.

825142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412573.

The product of its digits is 640, while the sum is 22.

The square root of 825142 is about 908.3732712932. The cubic root of 825142 is about 93.7942534778.

The spelling of 825142 in words is "eight hundred twenty-five thousand, one hundred forty-two".