1982545 has 4 divisors (see below), whose sum is σ = 2379060. Its totient is φ = 1586032.

The previous prime is 1982537. The next prime is 1982551. The reversal of 1982545 is 5452891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 725904 + 1256641 = 852^2 + 1121^2 .

It is a cyclic number.

It is not a de Polignac number, because 1982545 - 2³ = 1982537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1982545.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198250 + ... + 198259.

It is an arithmetic number, because the mean of its divisors is an integer number (594765).

2^1982545 is an apocalyptic number.

It is an amenable number.

1982545 is a deficient number, since it is larger than the sum of its proper divisors (396515).

1982545 is an equidigital number, since it uses as much as digits as its factorization.

1982545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396514.

The product of its digits is 14400, while the sum is 34.

The square root of 1982545 is about 1408.0287639107. The cubic root of 1982545 is about 125.6245014543.

The spelling of 1982545 in words is "one million, nine hundred eighty-two thousand, five hundred forty-five".