825645942 has 24 divisors (see below), whose sum is σ = 1951527240. Its totient is φ = 250195680.

The previous prime is 825645917. The next prime is 825645959. The reversal of 825645942 is 249546528.

825645942 is a `hidden beast` number, since 8 + 2 + 56 + 4 + 594 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2084767 + ... + 2085162.

It is an arithmetic number, because the mean of its divisors is an integer number (81313635).

Almost surely, 2^825645942 is an apocalyptic number.

825645942 is an abundant number, since it is smaller than the sum of its proper divisors (1125881298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825645942 is a wasteful number, since it uses less digits than its factorization.

825645942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4169948 (or 4169945 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 825645942 is about 28734.0554394955. The cubic root of 825645942 is about 938.1334402806.

The spelling of 825645942 in words is "eight hundred twenty-five million, six hundred forty-five thousand, nine hundred forty-two".