825841642 has 16 divisors (see below), whose sum is σ = 1287936000. Its totient is φ = 396673200.

The previous prime is 825841633. The next prime is 825841649. The reversal of 825841642 is 246148528.

It is a happy number.

It is a super-2 number, since 2×825841642² = 1364028835322512328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 825841595 and 825841604.

It is not an unprimeable number, because it can be changed into a prime (825841649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24234 + ... + 47317.

It is an arithmetic number, because the mean of its divisors is an integer number (80496000).

Almost surely, 2^825841642 is an apocalyptic number.

825841642 is a deficient number, since it is larger than the sum of its proper divisors (462094358).

825841642 is a wasteful number, since it uses less digits than its factorization.

825841642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71781.

The product of its digits is 122880, while the sum is 40.

The square root of 825841642 is about 28737.4606045837. The cubic root of 825841642 is about 938.2075552659.

The spelling of 825841642 in words is "eight hundred twenty-five million, eight hundred forty-one thousand, six hundred forty-two".