1224240 has 40 divisors (see below), whose sum is σ = 3795888. Its totient is φ = 326400.

The previous prime is 1224239. The next prime is 1224257. The reversal of 1224240 is 424221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2311 + ... + 2790.

2^1224240 is an apocalyptic number.

1224240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224240 is an abundant number, since it is smaller than the sum of its proper divisors (2571648).

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

1224240 is a wasteful number, since it uses less digits than its factorization.

1224240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117 (or 5111 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1224240 is about 1106.4537947877. The cubic root of 1224240 is about 106.9766158466.

Adding to 1224240 its reverse (424221), we get a palindrome (1648461).

The spelling of 1224240 in words is "one million, two hundred twenty-four thousand, two hundred forty".