1247143768 has 32 divisors (see below), whose sum is σ = 2521078560. Its totient is φ = 574963200.

The previous prime is 1247143759. The next prime is 1247143769. The reversal of 1247143768 is 8673417421.

It is a super-2 number, since 2×1247143768² = 3110735156122475648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247143769) 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, 94368 + ... + 106768.

It is an arithmetic number, because the mean of its divisors is an integer number (78783705).

Almost surely, 2^1247143768 is an apocalyptic number.

It is an amenable number.

1247143768 is an abundant number, since it is smaller than the sum of its proper divisors (1273934792).

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

1247143768 is a wasteful number, since it uses less digits than its factorization.

1247143768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13387 (or 13383 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 1247143768 is about 35314.9227381287. The cubic root of 1247143768 is about 1076.3962439228.

The spelling of 1247143768 in words is "one billion, two hundred forty-seven million, one hundred forty-three thousand, seven hundred sixty-eight".