825509542 has 32 divisors (see below), whose sum is σ = 1457406720. Its totient is φ = 345733920.

The previous prime is 825509521. The next prime is 825509543. The reversal of 825509542 is 245905528.

It is a junction number, because it is equal to n+sod(n) for n = 825509495 and 825509504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825509543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174703 + ... + 179365.

It is an arithmetic number, because the mean of its divisors is an integer number (45543960).

Almost surely, 2^825509542 is an apocalyptic number.

825509542 is a deficient number, since it is larger than the sum of its proper divisors (631897178).

825509542 is a wasteful number, since it uses less digits than its factorization.

825509542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5308.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 825509542 is about 28731.6818512248. The cubic root of 825509542 is about 938.0817763078.

The spelling of 825509542 in words is "eight hundred twenty-five million, five hundred nine thousand, five hundred forty-two".