1980506 has 8 divisors (see below), whose sum is σ = 3240864. Its totient is φ = 900220.

The previous prime is 1980491. The next prime is 1980521. The reversal of 1980506 is 6050891.

It is an interprime number because it is at equal distance from previous prime (1980491) and next prime (1980521).

It is a sphenic number, since it is the product of 3 distinct primes.

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, 44990 + ... + 45033.

It is an arithmetic number, because the mean of its divisors is an integer number (405108).

2^1980506 is an apocalyptic number.

1980506 is a deficient number, since it is larger than the sum of its proper divisors (1260358).

1980506 is a wasteful number, since it uses less digits than its factorization.

1980506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90036.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1980506 is about 1407.3045157321. The cubic root of 1980506 is about 125.5814194187.

The spelling of 1980506 in words is "one million, nine hundred eighty thousand, five hundred six".