1966271 has 4 divisors (see below), whose sum is σ = 2081952. Its totient is φ = 1850592.

The previous prime is 1966259. The next prime is 1966297. The reversal of 1966271 is 1726691.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1966271 - 2⁶ = 1966207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966241) 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 in 3 ways as a sum of consecutive naturals, for example, 57815 + ... + 57848.

It is an arithmetic number, because the mean of its divisors is an integer number (520488).

2^1966271 is an apocalyptic number.

1966271 is a deficient number, since it is larger than the sum of its proper divisors (115681).

1966271 is a wasteful number, since it uses less digits than its factorization.

1966271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115680.

The product of its digits is 4536, while the sum is 32.

The square root of 1966271 is about 1402.2378542886. The cubic root of 1966271 is about 125.2798211337.

The spelling of 1966271 in words is "one million, nine hundred sixty-six thousand, two hundred seventy-one".