1243885964 has 12 divisors (see below), whose sum is σ = 2178597624. Its totient is φ = 621429504.

The previous prime is 1243885963. The next prime is 1243885997. The reversal of 1243885964 is 4695883421.

It is not an unprimeable number, because it can be changed into a prime (1243885963) 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 3 ways as a sum of consecutive naturals, for example, 122894 + ... + 132629.

It is an arithmetic number, because the mean of its divisors is an integer number (181549802).

Almost surely, 2^1243885964 is an apocalyptic number.

It is an amenable number.

1243885964 is a deficient number, since it is larger than the sum of its proper divisors (934711660).

1243885964 is a wasteful number, since it uses less digits than its factorization.

1243885964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256744 (or 256742 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The square root of 1243885964 is about 35268.7675429692. The cubic root of 1243885964 is about 1075.4581682114.

The spelling of 1243885964 in words is "one billion, two hundred forty-three million, eight hundred eighty-five thousand, nine hundred sixty-four".