1216648 has 8 divisors (see below), whose sum is σ = 2281230. Its totient is φ = 608320.

The previous prime is 1216619. The next prime is 1216681. The reversal of 1216648 is 8466121.

It can be written as a sum of positive squares in only one way, i.e., 1127844 + 88804 = 1062^2 + 298^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76033 + ... + 76048.

2^1216648 is an apocalyptic number.

It is an amenable number.

1216648 is a deficient number, since it is larger than the sum of its proper divisors (1064582).

1216648 is a wasteful number, since it uses less digits than its factorization.

1216648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152087 (or 152083 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 1216648 is about 1103.0176789154. The cubic root of 1216648 is about 106.7550222780.

It can be divided in two parts, 121 and 6648, that multiplied together give a palindrome (804408).

The spelling of 1216648 in words is "one million, two hundred sixteen thousand, six hundred forty-eight".