1227664 has 15 divisors (see below), whose sum is σ = 2387217. Its totient is φ = 611616.

The previous prime is 1227659. The next prime is 1227683. The reversal of 1227664 is 4667221.

The square root of 1227664 is 1108.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 211600 + 1016064 = 460^2 + 1008^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4294 + ... + 4570.

2^1227664 is an apocalyptic number.

1227664 is the 1108-th square number.

It is an amenable number.

1227664 is a deficient number, since it is larger than the sum of its proper divisors (1159553).

1227664 is an frugal number, since it uses more digits than its factorization.

1227664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 279 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The cubic root of 1227664 is about 107.0762550731.

It can be divided in two parts, 1227 and 664, that added together give a triangular number (1891 = T₆₁).

The spelling of 1227664 in words is "one million, two hundred twenty-seven thousand, six hundred sixty-four".