1243135416 has 64 divisors (see below), whose sum is σ = 3213665280. Its totient is φ = 400459520.

The previous prime is 1243135403. The next prime is 1243135417. The reversal of 1243135416 is 6145313421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243135417) 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, 99385 + ... + 111191.

It is an arithmetic number, because the mean of its divisors is an integer number (50213520).

Almost surely, 2^1243135416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243135416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1606832640).

1243135416 is an abundant number, since it is smaller than the sum of its proper divisors (1970529864).

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

1243135416 is a wasteful number, since it uses less digits than its factorization.

1243135416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11964 (or 11960 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 1243135416 is about 35258.1255315707. The cubic root of 1243135416 is about 1075.2418178911.

Adding to 1243135416 its reverse (6145313421), we get a palindrome (7388448837).

The spelling of 1243135416 in words is "one billion, two hundred forty-three million, one hundred thirty-five thousand, four hundred sixteen".