1984545 has 12 divisors (see below), whose sum is σ = 3439956. Its totient is φ = 1058400.

The previous prime is 1984537. The next prime is 1984547. The reversal of 1984545 is 5454891.

1984545 = 258² + 259² + ... + 284².

It can be written as a sum of positive squares in 2 ways, for example, as 1580049 + 404496 = 1257^2 + 636^2 .

It is not a de Polignac number, because 1984545 - 2³ = 1984537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1984547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22006 + ... + 22095.

It is an arithmetic number, because the mean of its divisors is an integer number (286663).

2^1984545 is an apocalyptic number.

1984545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1984545 is a deficient number, since it is larger than the sum of its proper divisors (1455411).

1984545 is a wasteful number, since it uses less digits than its factorization.

1984545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44112 (or 44109 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 1984545 is about 1408.7387976484. The cubic root of 1984545 is about 125.6667307712. Note that the first 3 decimals are identical.

It can be divided in two parts, 19845 and 45, that multiplied together give a square (893025 = 945²).

The spelling of 1984545 in words is "one million, nine hundred eighty-four thousand, five hundred forty-five".