1211648 has 18 divisors (see below), whose sum is σ = 2419074. Its totient is φ = 605696.

The previous prime is 1211647. The next prime is 1211653. The reversal of 1211648 is 8461121.

It can be written as a sum of positive squares in only one way, i.e., 861184 + 350464 = 928^2 + 592^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2111 + ... + 2622.

It is an arithmetic number, because the mean of its divisors is an integer number (134393).

2^1211648 is an apocalyptic number.

It is an amenable number.

1211648 is a deficient number, since it is larger than the sum of its proper divisors (1207426).

1211648 is an frugal number, since it uses more digits than its factorization.

1211648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749 (or 4735 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 1211648 is about 1100.7488360203. The cubic root of 1211648 is about 106.6085794845.

Adding to 1211648 its reverse (8461121), we get a palindrome (9672769).

The spelling of 1211648 in words is "one million, two hundred eleven thousand, six hundred forty-eight".