125965866 has 16 divisors (see below), whose sum is σ = 271311264. Its totient is φ = 38758704.

The previous prime is 125965843. The next prime is 125965901. The reversal of 125965866 is 668569521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 807396 + ... + 807551.

It is an arithmetic number, because the mean of its divisors is an integer number (16956954).

Almost surely, 2^125965866 is an apocalyptic number.

125965866 is an abundant number, since it is smaller than the sum of its proper divisors (145345398).

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

125965866 is a wasteful number, since it uses less digits than its factorization.

125965866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614965.

The product of its digits is 777600, while the sum is 48.

The square root of 125965866 is about 11223.4516081284. The cubic root of 125965866 is about 501.2845185317.

The spelling of 125965866 in words is "one hundred twenty-five million, nine hundred sixty-five thousand, eight hundred sixty-six".