1224100 has 18 divisors (see below), whose sum is σ = 2656514. Its totient is φ = 489600.

The previous prime is 1224089. The next prime is 1224109. The reversal of 1224100 is 14221.

It can be written as a sum of positive squares in 3 ways, for example, as 18496 + 1205604 = 136^2 + 1098^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6021 + ... + 6220.

2^1224100 is an apocalyptic number.

1224100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224100 is an abundant number, since it is smaller than the sum of its proper divisors (1432414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1224100 is a wasteful number, since it uses less digits than its factorization.

1224100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12255 (or 12248 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1224100 is about 1106.3905277975. The cubic root of 1224100 is about 106.9725378616.

Adding to 1224100 its reverse (14221), we get a palindrome (1238321).

The spelling of 1224100 in words is "one million, two hundred twenty-four thousand, one hundred".