1980065 has 8 divisors (see below), whose sum is σ = 2395008. Its totient is φ = 1571440.

The previous prime is 1980053. The next prime is 1980067. The reversal of 1980065 is 5600891.

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

It is a de Polignac number, because none of the positive numbers 2^k-1980065 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980067) 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 7 ways as a sum of consecutive naturals, for example, 857 + ... + 2166.

It is an arithmetic number, because the mean of its divisors is an integer number (299376).

2^1980065 is an apocalyptic number.

It is an amenable number.

1980065 is a deficient number, since it is larger than the sum of its proper divisors (414943).

1980065 is a wasteful number, since it uses less digits than its factorization.

1980065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159.

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

The square root of 1980065 is about 1407.1478245017. The cubic root of 1980065 is about 125.5720976398.

The spelling of 1980065 in words is "one million, nine hundred eighty thousand, sixty-five".