1966071 has 4 divisors (see below), whose sum is σ = 2621432. Its totient is φ = 1310712.

The previous prime is 1966049. The next prime is 1966079. The reversal of 1966071 is 1706691.

1966071 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1966071 - 2⁶ = 1966007 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327676 + ... + 327681.

It is an arithmetic number, because the mean of its divisors is an integer number (655358).

2^1966071 is an apocalyptic number.

1966071 is a deficient number, since it is larger than the sum of its proper divisors (655361).

1966071 is an equidigital number, since it uses as much as digits as its factorization.

1966071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655360.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 1966071 is about 1402.1665378977. The cubic root of 1966071 is about 125.2755733615.

The spelling of 1966071 in words is "one million, nine hundred sixty-six thousand, seventy-one".