1227889 has 8 divisors (see below), whose sum is σ = 1368360. Its totient is φ = 1094016.

The previous prime is 1227887. The next prime is 1227911. The reversal of 1227889 is 9887221.

It can be written as a sum of positive squares in 4 ways, for example, as 193600 + 1034289 = 440^2 + 1017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1227889 - 2¹ = 1227887 is a prime.

It is a super-2 number, since 2×1227889² = 3015422792642, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1227881) 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 7 ways as a sum of consecutive naturals, for example, 1252 + ... + 2005.

It is an arithmetic number, because the mean of its divisors is an integer number (171045).

2^1227889 is an apocalyptic number.

It is an amenable number.

1227889 is a deficient number, since it is larger than the sum of its proper divisors (140471).

1227889 is a wasteful number, since it uses less digits than its factorization.

1227889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299.

The product of its digits is 16128, while the sum is 37.

The square root of 1227889 is about 1108.1015296443. The cubic root of 1227889 is about 107.0827961369.

It can be divided in two parts, 1227 and 889, that added together give a square (2116 = 46²).

The spelling of 1227889 in words is "one million, two hundred twenty-seven thousand, eight hundred eighty-nine".