1983545 has 4 divisors (see below), whose sum is σ = 2380260. Its totient is φ = 1586832.

The previous prime is 1983523. The next prime is 1983559. The reversal of 1983545 is 5453891.

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 1373584 + 609961 = 1172^2 + 781^2 .

It is a cyclic number.

It is not a de Polignac number, because 1983545 - 2¹⁰ = 1982521 is a prime.

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, 198350 + ... + 198359.

It is an arithmetic number, because the mean of its divisors is an integer number (595065).

2^1983545 is an apocalyptic number.

It is an amenable number.

1983545 is a deficient number, since it is larger than the sum of its proper divisors (396715).

1983545 is an equidigital number, since it uses as much as digits as its factorization.

1983545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396714.

The product of its digits is 21600, while the sum is 35.

The square root of 1983545 is about 1408.3838255248. The cubic root of 1983545 is about 125.6456196610.

The spelling of 1983545 in words is "one million, nine hundred eighty-three thousand, five hundred forty-five".