851005425 has 24 divisors (see below), whose sum is σ = 1407874176. Its totient is φ = 453586240.

The previous prime is 851005423. The next prime is 851005433. The reversal of 851005425 is 524500158.

It is not a de Polignac number, because 851005425 - 2¹ = 851005423 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 851005392 and 851005401.

It is not an unprimeable number, because it can be changed into a prime (851005423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181207 + ... + 185843.

It is an arithmetic number, because the mean of its divisors is an integer number (58661424).

Almost surely, 2^851005425 is an apocalyptic number.

It is an amenable number.

851005425 is a deficient number, since it is larger than the sum of its proper divisors (556868751).

851005425 is a wasteful number, since it uses less digits than its factorization.

851005425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7097 (or 7092 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 851005425 is about 29171.9972747839. The cubic root of 851005425 is about 947.6415830270.

It can be divided in two parts, 85100 and 5425, that added together give a triangular number (90525 = T₄₂₅).

The spelling of 851005425 in words is "eight hundred fifty-one million, five thousand, four hundred twenty-five".