825042745 has 4 divisors (see below), whose sum is σ = 990051300. Its totient is φ = 660034192.

The previous prime is 825042697. The next prime is 825042749. The reversal of 825042745 is 547240528.

It is a happy number.

825042745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 403849216 + 421193529 = 20096^2 + 20523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825042745 is a prime.

It is not an unprimeable number, because it can be changed into a prime (825042749) 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, 82504270 + ... + 82504279.

It is an arithmetic number, because the mean of its divisors is an integer number (247512825).

Almost surely, 2^825042745 is an apocalyptic number.

It is an amenable number.

825042745 is a deficient number, since it is larger than the sum of its proper divisors (165008555).

825042745 is a wasteful number, since it uses less digits than its factorization.

825042745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165008554.

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 825042745 is about 28723.5573179925. The cubic root of 825042745 is about 937.9049254052.

The spelling of 825042745 in words is "eight hundred twenty-five million, forty-two thousand, seven hundred forty-five".