1243113240 has 32 divisors (see below), whose sum is σ = 3729340080. Its totient is φ = 331496832.

The previous prime is 1243113173. The next prime is 1243113241. The reversal of 1243113240 is 423113421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243113241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5179519 + ... + 5179758.

Almost surely, 2^1243113240 is an apocalyptic number.

1243113240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243113240 is an abundant number, since it is smaller than the sum of its proper divisors (2486226840).

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

1243113240 is a wasteful number, since it uses less digits than its factorization.

1243113240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10359291 (or 10359287 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1243113240 is about 35257.8110494682. The cubic root of 1243113240 is about 1075.2354241912.

Adding to 1243113240 its reverse (423113421), we get a palindrome (1666226661).

The spelling of 1243113240 in words is "one billion, two hundred forty-three million, one hundred thirteen thousand, two hundred forty".