125696805 has 16 divisors (see below), whose sum is σ = 216585600. Its totient is φ = 61881408.

The previous prime is 125696803. The next prime is 125696819. The reversal of 125696805 is 508696521.

It is not a de Polignac number, because 125696805 - 2¹ = 125696803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125696803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322105 + ... + 322494.

It is an arithmetic number, because the mean of its divisors is an integer number (13536600).

Almost surely, 2^125696805 is an apocalyptic number.

125696805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125696805 is a deficient number, since it is larger than the sum of its proper divisors (90888795).

125696805 is a wasteful number, since it uses less digits than its factorization.

125696805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644620.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 125696805 is about 11211.4586472947. The cubic root of 125696805 is about 500.9273523054.

The spelling of 125696805 in words is "one hundred twenty-five million, six hundred ninety-six thousand, eight hundred five".