1980515 has 4 divisors (see below), whose sum is σ = 2376624. Its totient is φ = 1584408.

The previous prime is 1980491. The next prime is 1980521. The reversal of 1980515 is 5150891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5150891 = 349 ⋅14759.

It is a cyclic number.

It is not a de Polignac number, because 1980515 - 2¹⁰ = 1979491 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is an unprimeable number.

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, 198047 + ... + 198056.

It is an arithmetic number, because the mean of its divisors is an integer number (594156).

2^1980515 is an apocalyptic number.

1980515 is a deficient number, since it is larger than the sum of its proper divisors (396109).

1980515 is an equidigital number, since it uses as much as digits as its factorization.

1980515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396108.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 1980515 is about 1407.3077133307. The cubic root of 1980515 is about 125.5816096446.

The spelling of 1980515 in words is "one million, nine hundred eighty thousand, five hundred fifteen".