1840545 has 24 divisors (see below), whose sum is σ = 3646656. Its totient is φ = 841248.

The previous prime is 1840541. The next prime is 1840561. The reversal of 1840545 is 5450481.

It is not a de Polignac number, because 1840545 - 2² = 1840541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1840541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2607 + ... + 3236.

It is an arithmetic number, because the mean of its divisors is an integer number (151944).

2^1840545 is an apocalyptic number.

1840545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1840545 is a deficient number, since it is larger than the sum of its proper divisors (1806111).

1840545 is a wasteful number, since it uses less digits than its factorization.

1840545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5861 (or 5858 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 1840545 is about 1356.6668714169. Note that the first 3 decimals coincide. The cubic root of 1840545 is about 122.5506107686.

The spelling of 1840545 in words is "one million, eight hundred forty thousand, five hundred forty-five".