1980562 has 4 divisors (see below), whose sum is σ = 2970846. Its totient is φ = 990280.

The previous prime is 1980529. The next prime is 1980577. The reversal of 1980562 is 2650891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2650891 = 1237 ⋅2143.

It can be written as a sum of positive squares in only one way, i.e., 1022121 + 958441 = 1011^2 + 979^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495139 + ... + 495142.

2^1980562 is an apocalyptic number.

1980562 is a deficient number, since it is larger than the sum of its proper divisors (990284).

1980562 is an equidigital number, since it uses as much as digits as its factorization.

1980562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990283.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1980562 is about 1407.3244117829. The cubic root of 1980562 is about 125.5826030376.

The spelling of 1980562 in words is "one million, nine hundred eighty thousand, five hundred sixty-two".