1224140 has 24 divisors (see below), whose sum is σ = 2601312. Its totient is φ = 483840.

The previous prime is 1224133. The next prime is 1224149. The reversal of 1224140 is 414221.

It is not an unprimeable number, because it can be changed into a prime (1224149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1625 + ... + 2255.

It is an arithmetic number, because the mean of its divisors is an integer number (108388).

2^1224140 is an apocalyptic number.

1224140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224140 is an abundant number, since it is smaller than the sum of its proper divisors (1377172).

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

1224140 is a wasteful number, since it uses less digits than its factorization.

1224140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 735 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1224140 is about 1106.4086044495. The cubic root of 1224140 is about 106.9737030319.

Adding to 1224140 its reverse (414221), we get a palindrome (1638361).

The spelling of 1224140 in words is "one million, two hundred twenty-four thousand, one hundred forty".