1227564 has 72 divisors (see below), whose sum is σ = 3475472. Its totient is φ = 362880.

The previous prime is 1227563. The next prime is 1227619. The reversal of 1227564 is 4657221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227563) 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 23 ways as a sum of consecutive naturals, for example, 20094 + ... + 20154.

2^1227564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1227564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737736).

1227564 is an abundant number, since it is smaller than the sum of its proper divisors (2247908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1227564 is a wasteful number, since it uses less digits than its factorization.

1227564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 122 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 1227564 is about 1107.9548727272. The cubic root of 1227564 is about 107.0733476770.

It can be divided in two parts, 122756 and 4, that added together give a triangular number (122760 = T₄₉₅).

The spelling of 1227564 in words is "one million, two hundred twenty-seven thousand, five hundred sixty-four".