1822145 has 24 divisors (see below), whose sum is σ = 2527224. Its totient is φ = 1253376.

The previous prime is 1822123. The next prime is 1822147. The reversal of 1822145 is 5412281.

It can be written as a sum of positive squares in 12 ways, for example, as 262144 + 1560001 = 512^2 + 1249^2 .

It is not a de Polignac number, because 1822145 - 2¹⁰ = 1821121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1822145.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822147) 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, 18737 + ... + 18833.

It is an arithmetic number, because the mean of its divisors is an integer number (105301).

2^1822145 is an apocalyptic number.

It is an amenable number.

1822145 is a deficient number, since it is larger than the sum of its proper divisors (705079).

1822145 is a wasteful number, since it uses less digits than its factorization.

1822145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 132 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 1822145 is about 1349.8685121152. The cubic root of 1822145 is about 122.1408612173.

The spelling of 1822145 in words is "one million, eight hundred twenty-two thousand, one hundred forty-five".