1810481 has 2 divisors, whose sum is σ = 1810482. Its totient is φ = 1810480.

The previous prime is 1810477. The next prime is 1810507. The reversal of 1810481 is 1840181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1540081 + 270400 = 1241^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1810481 - 2² = 1810477 is a prime.

It is a super-2 number, since 2×1810481² = 6555682902722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1810421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905240 + 905241.

It is an arithmetic number, because the mean of its divisors is an integer number (905241).

2^1810481 is an apocalyptic number.

It is an amenable number.

1810481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1810481 is an equidigital number, since it uses as much as digits as its factorization.

1810481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 1810481 is about 1345.5411550748. The cubic root of 1810481 is about 121.8796852023.

The spelling of 1810481 in words is "one million, eight hundred ten thousand, four hundred eighty-one".