1243711964 has 24 divisors (see below), whose sum is σ = 2375256576. Its totient is φ = 565110000.

The previous prime is 1243711957. The next prime is 1243712047. The reversal of 1243711964 is 4691173421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209639 + ... + 215489.

It is an arithmetic number, because the mean of its divisors is an integer number (98969024).

Almost surely, 2^1243711964 is an apocalyptic number.

It is an amenable number.

1243711964 is a deficient number, since it is larger than the sum of its proper divisors (1131544612).

1243711964 is a wasteful number, since it uses less digits than its factorization.

1243711964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10697 (or 10695 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 1243711964 is about 35266.3006849315. The cubic root of 1243711964 is about 1075.4080193358.

The spelling of 1243711964 in words is "one billion, two hundred forty-three million, seven hundred eleven thousand, nine hundred sixty-four".