126781868 has 6 divisors (see below), whose sum is σ = 221868276. Its totient is φ = 63390932.

The previous prime is 126781867. The next prime is 126781873. The reversal of 126781868 is 868187621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (126781867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15847730 + ... + 15847737.

It is an arithmetic number, because the mean of its divisors is an integer number (36978046).

Almost surely, 2^126781868 is an apocalyptic number.

It is an amenable number.

126781868 is a deficient number, since it is larger than the sum of its proper divisors (95086408).

126781868 is a wasteful number, since it uses less digits than its factorization.

126781868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31695471 (or 31695469 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 126781868 is about 11259.7454678159. The cubic root of 126781868 is about 502.3646234827.

The spelling of 126781868 in words is "one hundred twenty-six million, seven hundred eighty-one thousand, eight hundred sixty-eight".