1221104 has 20 divisors (see below), whose sum is σ = 2385264. Its totient is φ = 605568.

The previous prime is 1221097. The next prime is 1221113. The reversal of 1221104 is 4011221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2444 + ... + 2900.

2^1221104 is an apocalyptic number.

It is an amenable number.

1221104 is a deficient number, since it is larger than the sum of its proper divisors (1164160).

1221104 is a wasteful number, since it uses less digits than its factorization.

1221104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1221104 is about 1105.0357460282. The cubic root of 1221104 is about 106.8851943583.

Adding to 1221104 its reverse (4011221), we get a palindrome (5232325).

The spelling of 1221104 in words is "one million, two hundred twenty-one thousand, one hundred four".