1822261 has 6 divisors (see below), whose sum is σ = 2119830. Its totient is φ = 1561896.

The previous prime is 1822259. The next prime is 1822277. The reversal of 1822261 is 1622281.

It can be written as a sum of positive squares in only one way, i.e., 1768900 + 53361 = 1330^2 + 231^2 .

It is not a de Polignac number, because 1822261 - 2¹ = 1822259 is a prime.

It is a Duffinian number.

1822261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18546 + ... + 18643.

It is an arithmetic number, because the mean of its divisors is an integer number (353305).

2^1822261 is an apocalyptic number.

It is an amenable number.

1822261 is a deficient number, since it is larger than the sum of its proper divisors (297569).

1822261 is an equidigital number, since it uses as much as digits as its factorization.

1822261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37203 (or 37196 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 1822261 is about 1349.9114785792. The cubic root of 1822261 is about 122.1434530417.

The spelling of 1822261 in words is "one million, eight hundred twenty-two thousand, two hundred sixty-one".