1822645 has 16 divisors (see below), whose sum is σ = 2465280. Its totient is φ = 1281600.

The previous prime is 1822637. The next prime is 1822649. The reversal of 1822645 is 5462281.

It is not a de Polignac number, because 1822645 - 2³ = 1822637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1171 + ... + 2239.

It is an arithmetic number, because the mean of its divisors is an integer number (154080).

2^1822645 is an apocalyptic number.

It is an amenable number.

1822645 is a deficient number, since it is larger than the sum of its proper divisors (642635).

1822645 is a wasteful number, since it uses less digits than its factorization.

1822645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

The product of its digits is 3840, while the sum is 28.

The square root of 1822645 is about 1350.0537026356. The cubic root of 1822645 is about 122.1520320893.

The spelling of 1822645 in words is "one million, eight hundred twenty-two thousand, six hundred forty-five".