1212242240 has 112 divisors (see below), whose sum is σ = 3222711360. Its totient is φ = 430510080.

The previous prime is 1212242231. The next prime is 1212242243. The reversal of 1212242240 is 422422121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212242243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147356 + ... + 155364.

Almost surely, 2^1212242240 is an apocalyptic number.

1212242240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212242240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1611355680).

1212242240 is an abundant number, since it is smaller than the sum of its proper divisors (2010469120).

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

1212242240 is a wasteful number, since it uses less digits than its factorization.

1212242240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8080 (or 8070 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1212242240 is about 34817.2692783337. The cubic root of 1212242240 is about 1066.2600498772.

Adding to 1212242240 its reverse (422422121), we get a palindrome (1634664361).

The spelling of 1212242240 in words is "one billion, two hundred twelve million, two hundred forty-two thousand, two hundred forty".