1845645 has 16 divisors (see below), whose sum is σ = 2996352. Its totient is φ = 969920.

The previous prime is 1845637. The next prime is 1845713. The reversal of 1845645 is 5465481.

It is not a de Polignac number, because 1845645 - 2³ = 1845637 is a prime.

It is a super-3 number, since 3×1845645³ = 18861045649025133375, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199 + ... + 1931.

It is an arithmetic number, because the mean of its divisors is an integer number (187272).

2^1845645 is an apocalyptic number.

1845645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1845645 is a deficient number, since it is larger than the sum of its proper divisors (1150707).

1845645 is a wasteful number, since it uses less digits than its factorization.

1845645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812.

The product of its digits is 19200, while the sum is 33.

The square root of 1845645 is about 1358.5451777545. The cubic root of 1845645 is about 122.6636989607.

The spelling of 1845645 in words is "one million, eight hundred forty-five thousand, six hundred forty-five".