1212341240 has 64 divisors (see below), whose sum is σ = 2979335520. Its totient is φ = 440320000.

The previous prime is 1212341237. The next prime is 1212341257. The reversal of 1212341240 is 421432121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 703580 + ... + 705300.

Almost surely, 2^1212341240 is an apocalyptic number.

1212341240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212341240 is an abundant number, since it is smaller than the sum of its proper divisors (1766994280).

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

1212341240 is a wasteful number, since it uses less digits than its factorization.

1212341240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3344 (or 3340 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1212341240 is about 34818.6909575877. The cubic root of 1212341240 is about 1066.2890751187.

Adding to 1212341240 its reverse (421432121), we get a palindrome (1633773361).

The spelling of 1212341240 in words is "one billion, two hundred twelve million, three hundred forty-one thousand, two hundred forty".