1227881 has 2 divisors, whose sum is σ = 1227882. Its totient is φ = 1227880.

The previous prime is 1227871. The next prime is 1227887. The reversal of 1227881 is 1887221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 737881 + 490000 = 859^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227881 - 2¹⁰ = 1226857 is a prime.

It is a super-2 number, since 2×1227881² = 3015383500322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1227887) 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, 613940 + 613941.

It is an arithmetic number, because the mean of its divisors is an integer number (613941).

2^1227881 is an apocalyptic number.

It is an amenable number.

1227881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227881 is an equidigital number, since it uses as much as digits as its factorization.

1227881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 29.

The square root of 1227881 is about 1108.0979198609. The cubic root of 1227881 is about 107.0825635794.

The spelling of 1227881 in words is "one million, two hundred twenty-seven thousand, eight hundred eighty-one".