125523681 has 16 divisors (see below), whose sum is σ = 173741568. Its totient is φ = 80524800.

The previous prime is 125523679. The next prime is 125523691. The reversal of 125523681 is 186325521.

It is not a de Polignac number, because 125523681 - 2¹ = 125523679 is a prime.

It is a super-3 number, since 3×125523681³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (125523611) 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 15 ways as a sum of consecutive naturals, for example, 13105 + ... + 20561.

It is an arithmetic number, because the mean of its divisors is an integer number (10858848).

Almost surely, 2^125523681 is an apocalyptic number.

It is an amenable number.

125523681 is a deficient number, since it is larger than the sum of its proper divisors (48217887).

125523681 is a wasteful number, since it uses less digits than its factorization.

125523681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7672.

The product of its digits is 14400, while the sum is 33.

The square root of 125523681 is about 11203.7351361053. The cubic root of 125523681 is about 500.6972685146.

The spelling of 125523681 in words is "one hundred twenty-five million, five hundred twenty-three thousand, six hundred eighty-one".