1980211 has 4 divisors (see below), whose sum is σ = 2096712. Its totient is φ = 1863712.

The previous prime is 1980191. The next prime is 1980221. The reversal of 1980211 is 1120891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1120891 = 241 ⋅4651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1980211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1980221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58225 + ... + 58258.

It is an arithmetic number, because the mean of its divisors is an integer number (524178).

2^1980211 is an apocalyptic number.

1980211 is a deficient number, since it is larger than the sum of its proper divisors (116501).

1980211 is a wasteful number, since it uses less digits than its factorization.

1980211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116500.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1980211 is about 1407.1997015349. The cubic root of 1980211 is about 125.5751839148.

The spelling of 1980211 in words is "one million, nine hundred eighty thousand, two hundred eleven".