1982645 has 16 divisors (see below), whose sum is σ = 2794368. Its totient is φ = 1321920.

The previous prime is 1982641. The next prime is 1982671. The reversal of 1982645 is 5462891.

It is not a de Polignac number, because 1982645 - 2² = 1982641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530 + ... + 2060.

It is an arithmetic number, because the mean of its divisors is an integer number (174648).

2^1982645 is an apocalyptic number.

It is an amenable number.

1982645 is a deficient number, since it is larger than the sum of its proper divisors (811723).

1982645 is a wasteful number, since it uses less digits than its factorization.

1982645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580.

The product of its digits is 17280, while the sum is 35.

The square root of 1982645 is about 1408.0642741012. The cubic root of 1982645 is about 125.6266135944.

The spelling of 1982645 in words is "one million, nine hundred eighty-two thousand, six hundred forty-five".