1381246866 has 24 divisors (see below), whose sum is σ = 2997268560. Its totient is φ = 459713016.

The previous prime is 1381246849. The next prime is 1381246879. The reversal of 1381246866 is 6686421831.

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 11 ways as a sum of consecutive naturals, for example, 46360 + ... + 70083.

It is an arithmetic number, because the mean of its divisors is an integer number (124886190).

Almost surely, 2^1381246866 is an apocalyptic number.

1381246866 is an abundant number, since it is smaller than the sum of its proper divisors (1616021694).

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

1381246866 is a wasteful number, since it uses less digits than its factorization.

1381246866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117110 (or 117107 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 1381246866 is about 37165.1297051416. The cubic root of 1381246866 is about 1113.6714900426.

The spelling of 1381246866 in words is "one billion, three hundred eighty-one million, two hundred forty-six thousand, eight hundred sixty-six".