126686865 has 32 divisors (see below), whose sum is σ = 207308160. Its totient is φ = 66043904.

The previous prime is 126686827. The next prime is 126686867. The reversal of 126686865 is 568686621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 126686865 - 2¹² = 126682769 is a prime.

It is a super-3 number, since 3×126686865³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (126686867) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 227167 + ... + 227723.

It is an arithmetic number, because the mean of its divisors is an integer number (6478380).

Almost surely, 2^126686865 is an apocalyptic number.

126686865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126686865 is a deficient number, since it is larger than the sum of its proper divisors (80621295).

126686865 is a wasteful number, since it uses less digits than its factorization.

126686865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881.

The product of its digits is 829440, while the sum is 48.

The square root of 126686865 is about 11255.5259761594. The cubic root of 126686865 is about 502.2391111280.

The spelling of 126686865 in words is "one hundred twenty-six million, six hundred eighty-six thousand, eight hundred sixty-five".