1243941916 has 48 divisors (see below), whose sum is σ = 2536886016. Its totient is φ = 522716544.

The previous prime is 1243941911. The next prime is 1243941917. The reversal of 1243941916 is 6191493421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243941911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316435 + ... + 320341.

It is an arithmetic number, because the mean of its divisors is an integer number (52851792).

Almost surely, 2^1243941916 is an apocalyptic number.

It is an amenable number.

1243941916 is an abundant number, since it is smaller than the sum of its proper divisors (1292944100).

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

1243941916 is a wasteful number, since it uses less digits than its factorization.

1243941916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138 (or 4136 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 1243941916 is about 35269.5607571175. The cubic root of 1243941916 is about 1075.4742932515.

The spelling of 1243941916 in words is "one billion, two hundred forty-three million, nine hundred forty-one thousand, nine hundred sixteen".