1212240 has 40 divisors (see below), whose sum is σ = 3758688. Its totient is φ = 323200.

The previous prime is 1212227. The next prime is 1212241. The reversal of 1212240 is 422121.

1212240 is nontrivially palindromic in base 11.

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 (12).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212241) 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, 2286 + ... + 2765.

2^1212240 is an apocalyptic number.

1212240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212240 is an abundant number, since it is smaller than the sum of its proper divisors (2546448).

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

1212240 is a wasteful number, since it uses less digits than its factorization.

1212240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5067 (or 5061 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1212240 is about 1101.0177110292. The cubic root of 1212240 is about 106.6259393126.

Adding to 1212240 its reverse (422121), we get a palindrome (1634361).

The spelling of 1212240 in words is "one million, two hundred twelve thousand, two hundred forty".