1224540 has 36 divisors (see below), whose sum is σ = 3714984. Its totient is φ = 326496.

The previous prime is 1224533. The next prime is 1224577. The reversal of 1224540 is 454221.

1224540 is a `hidden beast` number, since 122 + 4 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3222 + ... + 3581.

It is an arithmetic number, because the mean of its divisors is an integer number (103194).

2^1224540 is an apocalyptic number.

1224540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224540 is an abundant number, since it is smaller than the sum of its proper divisors (2490444).

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

1224540 is a wasteful number, since it uses less digits than its factorization.

1224540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818 (or 6813 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1224540 is about 1106.5893547292. The cubic root of 1224540 is about 106.9853533392.

Adding to 1224540 its reverse (454221), we get a palindrome (1678761).

It can be divided in two parts, 1224 and 540, that added together give a square (1764 = 42²).

The spelling of 1224540 in words is "one million, two hundred twenty-four thousand, five hundred forty".