1240243312 has 60 divisors (see below), whose sum is σ = 3049432056. Its totient is φ = 483208320.

The previous prime is 1240243309. The next prime is 1240243321. The reversal of 1240243312 is 2133420421.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 63283 + ... + 80530.

Almost surely, 2^1240243312 is an apocalyptic number.

It is an amenable number.

1240243312 is an abundant number, since it is smaller than the sum of its proper divisors (1809188744).

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

1240243312 is a wasteful number, since it uses less digits than its factorization.

1240243312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143846 (or 143833 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1240243312 is about 35217.0883521054. The cubic root of 1240243312 is about 1074.4073349691.

Adding to 1240243312 its reverse (2133420421), we get a palindrome (3373663733).

The spelling of 1240243312 in words is "one billion, two hundred forty million, two hundred forty-three thousand, three hundred twelve".