1980671 has 16 divisors (see below), whose sum is σ = 2557440. Its totient is φ = 1488480.

The previous prime is 1980661. The next prime is 1980673. The reversal of 1980671 is 1760891.

It is not a de Polignac number, because 1980671 - 2⁶ = 1980607 is a prime.

It is a super-2 number, since 2×1980671² = 7846115220482, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1790 + ... + 2676.

It is an arithmetic number, because the mean of its divisors is an integer number (159840).

2^1980671 is an apocalyptic number.

1980671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1980671 is a deficient number, since it is larger than the sum of its proper divisors (576769).

1980671 is a wasteful number, since it uses less digits than its factorization.

1980671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1980671 is about 1407.3631372180. The cubic root of 1980671 is about 125.5849068033.

The spelling of 1980671 in words is "one million, nine hundred eighty thousand, six hundred seventy-one".