1980517 has 24 divisors (see below), whose sum is σ = 2652480. Its totient is φ = 1436160.

The previous prime is 1980491. The next prime is 1980521. The reversal of 1980517 is 7150891.

It is not a de Polignac number, because 1980517 - 2¹¹ = 1978469 is a prime.

It is an Ulam 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 (1980577) 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 23 ways as a sum of consecutive naturals, for example, 22209 + ... + 22297.

It is an arithmetic number, because the mean of its divisors is an integer number (110520).

2^1980517 is an apocalyptic number.

1980517 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1980517 is a deficient number, since it is larger than the sum of its proper divisors (671963).

1980517 is a wasteful number, since it uses less digits than its factorization.

1980517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 1980517 is about 1407.3084239071. The cubic root of 1980517 is about 125.5816519170.

The spelling of 1980517 in words is "one million, nine hundred eighty thousand, five hundred seventeen".