1980043 has 4 divisors (see below), whose sum is σ = 2132368. Its totient is φ = 1827720.

The previous prime is 1980031. The next prime is 1980053. The reversal of 1980043 is 3400891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1980043 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1980023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76143 + ... + 76168.

It is an arithmetic number, because the mean of its divisors is an integer number (533092).

2^1980043 is an apocalyptic number.

1980043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1980043 is a deficient number, since it is larger than the sum of its proper divisors (152325).

1980043 is a wasteful number, since it uses less digits than its factorization.

1980043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152324.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1980043 is about 1407.1400072487. The cubic root of 1980043 is about 125.5716325715.

The spelling of 1980043 in words is "one million, nine hundred eighty thousand, forty-three".