125778563 has 12 divisors (see below), whose sum is σ = 137629800. Its totient is φ = 114546240.

The previous prime is 125778557. The next prime is 125778571. The reversal of 125778563 is 365877521.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-125778563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125774563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12488 + ... + 20186.

It is an arithmetic number, because the mean of its divisors is an integer number (11469150).

Almost surely, 2^125778563 is an apocalyptic number.

125778563 is a deficient number, since it is larger than the sum of its proper divisors (11851237).

125778563 is an equidigital number, since it uses as much as digits as its factorization.

125778563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7778 (or 7747 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The square root of 125778563 is about 11215.1042349146. The cubic root of 125778563 is about 501.0359361901.

It can be divided in two parts, 125 and 778563, that added together give a cube (778688 = 92³).

The spelling of 125778563 in words is "one hundred twenty-five million, seven hundred seventy-eight thousand, five hundred sixty-three".