851085025 has 48 divisors (see below), whose sum is σ = 1306952064. Its totient is φ = 536417280.

The previous prime is 851085013. The next prime is 851085029. The reversal of 851085025 is 520580158.

It is a happy number.

851085025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-851085025 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851085029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 124599 + ... + 131251.

It is an arithmetic number, because the mean of its divisors is an integer number (27228168).

Almost surely, 2^851085025 is an apocalyptic number.

851085025 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

851085025 is a deficient number, since it is larger than the sum of its proper divisors (455867039).

851085025 is a wasteful number, since it uses less digits than its factorization.

851085025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6730 (or 6725 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 34.

The square root of 851085025 is about 29173.3615649620. The cubic root of 851085025 is about 947.6711284392.

The spelling of 851085025 in words is "eight hundred fifty-one million, eighty-five thousand, twenty-five".