851197 has 2 divisors, whose sum is σ = 851198. Its totient is φ = 851196.

The previous prime is 851177. The next prime is 851203. The reversal of 851197 is 791158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 682276 + 168921 = 826^2 + 411^2 .

It is a cyclic number.

It is not a de Polignac number, because 851197 - 2¹⁵ = 818429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425598 + 425599.

It is an arithmetic number, because the mean of its divisors is an integer number (425599).

2⁸⁵¹¹⁹⁷ is an apocalyptic number.

It is an amenable number.

851197 is a deficient number, since it is larger than the sum of its proper divisors (1).

851197 is an equidigital number, since it uses as much as digits as its factorization.

851197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 31.

The square root of 851197 is about 922.6033817410. The cubic root of 851197 is about 94.7712687476.

The spelling of 851197 in words is "eight hundred fifty-one thousand, one hundred ninety-seven".