1965851 has 2 divisors, whose sum is σ = 1965852. Its totient is φ = 1965850.

The previous prime is 1965781. The next prime is 1965853. The reversal of 1965851 is 1585691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1965851 - 2¹⁰ = 1964827 is a prime.

Together with 1965853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1965853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982925 + 982926.

It is an arithmetic number, because the mean of its divisors is an integer number (982926).

2^1965851 is an apocalyptic number.

1965851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1965851 is an equidigital number, since it uses as much as digits as its factorization.

1965851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 35.

The square root of 1965851 is about 1402.0880856779. The cubic root of 1965851 is about 125.2709004793.

The spelling of 1965851 in words is "one million, nine hundred sixty-five thousand, eight hundred fifty-one".