1821795 has 8 divisors (see below), whose sum is σ = 2914896. Its totient is φ = 971616.

The previous prime is 1821791. The next prime is 1821821. The reversal of 1821795 is 5971281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1821795 - 2² = 1821791 is a prime.

1821795 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1821791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60712 + ... + 60741.

It is an arithmetic number, because the mean of its divisors is an integer number (364362).

2^1821795 is an apocalyptic number.

1821795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1821795 is a deficient number, since it is larger than the sum of its proper divisors (1093101).

1821795 is a wasteful number, since it uses less digits than its factorization.

1821795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121461.

The product of its digits is 5040, while the sum is 33.

The square root of 1821795 is about 1349.7388636325. The cubic root of 1821795 is about 122.1330403910.

The spelling of 1821795 in words is "one million, eight hundred twenty-one thousand, seven hundred ninety-five".