1823281 has 2 divisors, whose sum is σ = 1823282. Its totient is φ = 1823280.

The previous prime is 1823257. The next prime is 1823287.

1823281 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1083681 + 739600 = 1041^2 + 860^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1823281 - 2⁷ = 1823153 is a prime.

It is a super-2 number, since 2×1823281² = 6648707209922, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1823287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 911640 + 911641.

It is an arithmetic number, because the mean of its divisors is an integer number (911641).

2^1823281 is an apocalyptic number.

It is an amenable number.

1823281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1823281 is an equidigital number, since it uses as much as digits as its factorization.

1823281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 25.

The square root of 1823281 is about 1350.2892282767. The cubic root of 1823281 is about 122.1662384867.

It can be divided in two parts, 182328 and 1, that added together give a square (182329 = 427²).

The spelling of 1823281 in words is "one million, eight hundred twenty-three thousand, two hundred eighty-one".