1982775 has 12 divisors (see below), whose sum is σ = 3278312. Its totient is φ = 1057440.

The previous prime is 1982741. The next prime is 1982779. The reversal of 1982775 is 5772891.

It is not a de Polignac number, because 1982775 - 2⁹ = 1982263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982779) 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 11 ways as a sum of consecutive naturals, for example, 13144 + ... + 13293.

2^1982775 is an apocalyptic number.

1982775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1982775 is a deficient number, since it is larger than the sum of its proper divisors (1295537).

1982775 is a wasteful number, since it uses less digits than its factorization.

1982775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26450 (or 26445 counting only the distinct ones).

The product of its digits is 35280, while the sum is 39.

The square root of 1982775 is about 1408.1104360099. The cubic root of 1982775 is about 125.6293592705.

The spelling of 1982775 in words is "one million, nine hundred eighty-two thousand, seven hundred seventy-five".