971851 has 2 divisors, whose sum is σ = 971852. Its totient is φ = 971850.

The previous prime is 971833. The next prime is 971857. The reversal of 971851 is 158179.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 971851 - 2⁷ = 971723 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (971857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485925 + 485926.

It is an arithmetic number, because the mean of its divisors is an integer number (485926).

2⁹⁷¹⁸⁵¹ is an apocalyptic number.

971851 is a deficient number, since it is larger than the sum of its proper divisors (1).

971851 is an equidigital number, since it uses as much as digits as its factorization.

971851 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 971851 is about 985.8250351863. The cubic root of 971851 is about 99.0527556119.

The spelling of 971851 in words is "nine hundred seventy-one thousand, eight hundred fifty-one".