1227861 has 6 divisors (see below), whose sum is σ = 1773590. Its totient is φ = 818568.

The previous prime is 1227847. The next prime is 1227871. The reversal of 1227861 is 1687221.

It can be written as a sum of positive squares in only one way, i.e., 1134225 + 93636 = 1065^2 + 306^2 .

It is not a de Polignac number, because 1227861 - 2⁵ = 1227829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227841) 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 in 5 ways as a sum of consecutive naturals, for example, 68206 + ... + 68223.

2^1227861 is an apocalyptic number.

It is an amenable number.

1227861 is a deficient number, since it is larger than the sum of its proper divisors (545729).

1227861 is a wasteful number, since it uses less digits than its factorization.

1227861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136435 (or 136432 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1227861 is about 1108.0888953509. The cubic root of 1227861 is about 107.0819821814.

The spelling of 1227861 in words is "one million, two hundred twenty-seven thousand, eight hundred sixty-one".