1222664 has 8 divisors (see below), whose sum is σ = 2292510. Its totient is φ = 611328.

The previous prime is 1222651. The next prime is 1222667. The reversal of 1222664 is 4662221.

It can be written as a sum of positive squares in only one way, i.e., 1085764 + 136900 = 1042^2 + 370^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1222667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76409 + ... + 76424.

2^1222664 is an apocalyptic number.

It is an amenable number.

1222664 is a deficient number, since it is larger than the sum of its proper divisors (1069846).

1222664 is a wasteful number, since it uses less digits than its factorization.

1222664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152839 (or 152835 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 1222664 is about 1105.7413802513. The cubic root of 1222664 is about 106.9306914243.

Adding to 1222664 its reverse (4662221), we get a palindrome (5884885).

The spelling of 1222664 in words is "one million, two hundred twenty-two thousand, six hundred sixty-four".