851205259 has 2 divisors, whose sum is σ = 851205260. Its totient is φ = 851205258.

The previous prime is 851205241. The next prime is 851205293. The reversal of 851205259 is 952502158.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851205259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (851205359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425602629 + 425602630.

It is an arithmetic number, because the mean of its divisors is an integer number (425602630).

Almost surely, 2^851205259 is an apocalyptic number.

851205259 is a deficient number, since it is larger than the sum of its proper divisors (1).

851205259 is an equidigital number, since it uses as much as digits as its factorization.

851205259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 851205259 is about 29175.4221734665. The cubic root of 851205259 is about 947.7157526236.

The spelling of 851205259 in words is "eight hundred fifty-one million, two hundred five thousand, two hundred fifty-nine".